In the question below, three sentences are given followed by four connectors. From the options below, choose the one that provides the correct combination of connectors to be used in the right order to join the sentences.
A. From the inner room, Hurtado didn't see the two men enter the office.
B. She didn't hear any words.
C. She did hear gunshots, too many to count. 1. Nor 2. But 3. Though 4. Since

A talks about the fact that the subject did not see the men enter the office. B complements this by telling us that she did not hear any words either. NOR can be used here to introduce a second complementary negative fact. C counters this by introducing a contrasting fact - she heard gunshots. BUT and THOUGH can be used to link the statements here. 1 and 2 & 1 and 3 are possible combinations, out of which only the former is given in the options. The joined sentence will be: "From the inner room, Hurtado didn't see the two men enter the office, nor did she hear any words, but he did hear gunshots, too many to count." Thus, (a) is the right answer.