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


D
E
Yah, i dont’ like my D. I didn’t see the “and’ in there.
(E) that the North American Indians developed advanced full-year calendars based
E
C
c
E
Answer shud be “E”
Two mistakes in the question : Have developed.. and basing them
So A,B & C can be eliminated. Now D and E are left. D is lengthy and inappropriate here. So ” E” is right.
Let me know if I my approach is right or not.
My Choice is C
E
IMO E.
its E, Raghu is right in his explanation
Have developed.. and basing them are the errors in A…
E corrects it……
E is by all means the winner here!!
E
E
E