The answer to this is letter C. In order to answer this question, it is important that you understand what the sentence would like to point out. It wants to say that you can find a collection of Medieval and Renaissance manuscripts in New York City. Using letter A will not be ideal because the word ‘of’ cannot be followed by is.
Take note that you need to find the right verb in order to make the sentence complete. Out of the remaining choices that are available, C is the most ideal and it is also the sentence that can be used in order to make the most sense.
From the start you notice there is no verb in the sentence. Previous to the blank is the subject and after is the object. Option B is eliminated since it has no verb. Option D is eliminated because it has a connector which we don┤t need; it would provide for an incomplete meaning. Option A is eliminated because it would require a present or past participle verb, and the sentence doesn┤t have one. Leaving only option C as the correct option.