306. For members of the seventeenth-century Ashanti nation in Africa, animal-hide shields with wooden frames were essential items of military equipment, a method to protect warriors against enemy arrows and spears.
(A) a method to protect
(B) as a method protecting
(D) as a protection of
(E) to protect
please explain .. how do you know/conclude the answer has to be a regular clause or modifier here? or explain a way how you come to the conclusion to get the answer?
IMO C). But confused.."protecting"
refers to the "subject + verb" since it is a verb modifier.
A) wrong - noun modified does not modify entire clause, it is not near to noun.
B) as a method to protect - "animal-hide shields" is not method but it is item.
D) as a protection of - same as B.
E) to protect - "infinitive form" cannot modify the clause.