Analysis:
A. the origins of maize were soon forgotten, many of its cultivators thinking it native to Turkey
Brought from .... and
quickly adapted should point to
Maize as the noun,
not origins of maize.
B. the origins of maize were soon forgotten, many of its cultivators thinking it was a native of Turkey
Same error as A
C. maize was thought by many of its cultivators to be native to Turkey and its origins were soon forgotten
Correct answer as Maize was brought and quickly adapted.
D. maize's origins were soon forgotten, many of its cultivators thinking they were native to Turkey
Sentence points out that
Maize's origins were brought and quickly adapted which is incorrect. It alters the meaning of the sentence as origins
cannot be brought or adapted.
E. many of the cultivators of maize soon forgot its origins and thought Turkey was its nativity
It was maize that was brought and adapted, not cultivators. The noun modifier should touch the noun in the sentence hence maize should immediately follow the modifier
brought and adapted.