VA-Sentance correction

Sentence correction:
263.A “calendar stick” carved centuries ago by the Winnebago tribe may provide the first evidence that the North American Indians have developed advanced full-year calendars basing them on systematic astronomical observation.
(A) that the North American Indians have developed advanced full-year calendars basing them
(B) of the North American Indians who have developed advanced full-year calendars and based them
(C) of the development of advanced full-year calendars by North American Indians, basing them
(D) of the North American Indians and their development of advanced full-year calendars based
(E) that the North American Indians developed advanced full-year calendars based

264.A 1972 agreement between Canada and the United States reduced the amount of phosphates that municipalities had been allowed to dump into the Great Lakes.
(A) reduced the amount of phosphates that municipalities had been allowed to dump
(B) reduced the phosphate amount that municipalities had been dumping
(C) reduces the phosphate amount municipalities have been allowed to dump
(D) reduced the amount of phosphates that municipalities are allowed to dump
(E) reduces the amount of phosphates allowed for dumping by municipalities
265.A collection of 38 poems by Phillis Wheatley, a slave, was published in the 1770’s, the first book by a Black woman and it was only the second published by an American woman.
(A) it was only the second published by an American woman
(B) it was only the second that an American woman published
(C) the second one only published by an American woman
(D) the second one only that an American woman published
(E) only the second published by an American woman
266.A common disability in test pilots is hearing impairment, a consequence of sitting too close to large jet engines for long periods of time.
(A) a consequence of sitting too close to large jet engines for long periods of time
(B) a consequence from sitting for long periods of time too near to large jet engines
(C) a consequence which resulted from sitting too close to large jet engines for long periods of time
(D) damaged from sitting too near to large jet engines for long periods of time
(E) damaged because they sat too close to large jet engines for long periods of time
267.A controversial figure throughout most of his public life, the Black leader Marcus Garvey advocated that some Blacks return to Africa, the land that, to him, symbolized the possibility of freedom.
(A) that some Blacks return to Africa, the land that, to him, symbolized the possibility of freedom
(B) that some Blacks return to the African land symbolizing the possibility of freedom to him
(C) that some Blacks return to Africa which was the land which symbolized the possibility of freedom to him
(D) some Black’s returning to Africa which was the land that to him symbolized the possibility of freedom
(E) some Black’s return to the land symbolizing the possibility of freedom to him, Africa