SajjadAhmad
Using a 64-beam laser to create a detailed 3D map of its environment, the self-driving car prototype, although already obsolete,
proved as equipped for navigating any conditions roads could put in front of it.A. proved as equipped for navigating any conditions roads could put in front of it
B. proved itself equipped to navigate any conditions roads could put in front of it
C. proved as equipped to navigate any conditions roads could put in front of it
D. prove to be as equipped to navigate any conditions roads could put in front of it
E. proved to have been equipped for navigating any conditions roads could put in front of it
Source: GMAT Free
Official Explanation
Creating a filter: the original sentence is defective, since the comparative "as" always properly comes in pairs; the prototype must be as equipped as something else for the word to be used right.
Applying the filter: we eliminate choices (A) and (C). And also choice (D), for that matter: there's a sneaky "as" after "to be." We're left with (B) and (E). Choice (E)'s verb tense is unnecessarily complex; it appears to refer to some other time in the past that isn't mentioned in the sentence.
The correct answer is (B).