SC - Verb tense

[karthikpandian19]

1. 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

[mathbyvemuri]

A is wrong as the present-perfect tense 'have developed' is used to represent an issue related to very past.
B and D are wrong as they wrongly represent the "calender stick" as the evidence of North American Indians instead of that of North American Indians' work
There is a tie between C and E.
I prefer "E" as there is an ambiguity about 'them' used in option "C"

[Bill@VeritasPrep]

I prefer "E" as there is an ambiguity about 'them' used in option "C"

C actually has a misplaced modifier. The participial phrase at the end ("basing them...") can modify the noun before the comma ("calendars") or the subject of the clause ("calendar stick"), neither of which makes sense.

[mathbyvemuri]

C actually has a misplaced modifier. The participial phrase at the end ("basing them...") can modify the noun before the comma ("calendars") or the subject of the clause ("calendar stick"), neither of which makes sense.

Bill, it's a good explanation

[jordan23]

IMO E

[karthikpandian19]

E is OA