Can a pronoun refer to a clause? Or in other words, can it refer to any other sentence fragment other than a noun?
Dental caries and gingivitis can be exacerbated not only by what patients eat but also by when they eat it.
In this sentence what does 'IT' refer to? Is it referring to a clause 'what patients eat'? Is it possible in real GMAT to have such constructions? So far my understanding was that a pronoun need a clear antecedent, which should be a noun.
This sentence is copied from 1000SC and the questions number is 238. This is a general query about the pronoun, not really that I am discussing the SC question itself. I hope posting such queries about any sentences from 1000sc is not a violation of forum rules.