Here's the
official explanation for this question:
This sentence begins with an adverbial clause in the present tense,
as litigation grows more complex. The
as indicates that the adverbial clause describes an event occurring at the same time as those described in the sentence's main clause. For the main clause to adhere to the conventions of English diction, the noun
need should be followed here by a prepositional phrase starting with
of or
for.
Option A: using the noun
need with the subordinate clause
that experts explain technical issues violates the conventions of English diction.
Option B: The
as beginning the sentence indicates that the main clause should be in a suitable tense coherent with the initial adverbial clause, so it is incorrect to use the past tense
became.
Option C: Correct. The noun
need is appropriately followed by the prepositional phrase
for experts to explain technical issues . The main clause appropriately fits with the present tense of the initial adverbial clause since
becomes is a present tense verb form.
Option D: Using the noun
need with the subordinate clause
that technical issues be explained by experts violates the conventions of English diction. Furthermore, the
as beginning the sentence indicates that the main clause should be in a suitable tense coherent with the initial adverbial clause, so it is incorrect to use the past tense
became.
Option E: Using the noun
need with the subordinate clause
that there be explanations of technical issues by experts violates the conventions of English diction. The subordinate clause is also needlessly verbose. Furthermore, the
as beginning the sentence indicates that like the initial adverbial clause, the main clause should describe an event occurring now or in the future, but
has become indicates an event that has already occurred.
The correct answer is C.