Explanation
Correct answer: C.
Choice C is the best answer. The convention being tested is the use of verb forms within a sentence. A main clause requires a finite (tensed) verb to perform the action of the subject (in this case, “more than 10,000 women”), and this choice supplies the finite past tense verb “served” to state what the women did.
Why the other choices are wrong
Choice A
Choice A is incorrect because it results in an ungrammatical sentence. The nonfinite participle “having served” doesn’t supply the main clause with a finite verb.
Choice B
Choice B is incorrect because it results in an ungrammatical sentence. The nonfinite to-infinitive “to serve” doesn’t supply the main clause with a finite verb.
Choice D
Choice D is incorrect because it results in an ungrammatical sentence. The nonfinite participle “serving” doesn’t supply the main clause with a finite verb.
Student discussion
marcosat 0 likes
Any other option results in two dependent sentences. No complete thought