Ergenekon
Difficult question. In order to correctly answer this question, I think one needs to know about 'perfect infinitive'.
Strictly speaking, even without knowing
perfect infinitives, the correct answer can be arrived at, through process of elimination.
equipped to is the right idiom and so, A and E are out. C and D use
paths, but since the sentence refers to the Neanderthals
collectively as a
species, the use of
paths is incorrect.
Nevertheless, knowledge of perfect infinitives can come in handy on GMAT, because they can indeed be tested and are very
flexible: They can act
either as
present perfect,
past perfect or (in some rare cases) as
simple past, and always indicate that the action in the perfect infinitive happened
before the action of the main verb of the clause.
p.s. Our book
EducationAisle Sentence Correction Nirvana discusses
perfect infinitive, its application and examples in significant detail. If someone is interested, PM me your email-id, I can mail the corresponding section. In fact, it’s interesting that our book actually refers to this very official question in the section on perfect infinitives.