Sentence Correction

Though renowned by 19th century US generals for their tactical prowess and tenacity in battle, few people are now aware that the Apache had already established a fearsome military reputation after their successful 17th century attacks on the Spanish settlements of Sonora.

(A) few people are now aware that the Apache had already established
(B) few people are now aware that the Apache have already established
(C) it is worth noting that the Apache already established
(D) the Apache had earlier established themselves
(E) the Apache, as few people now realize, had already established


OA E

Source: Veritas Prep