Answer:
C) pauses to recall things from the past.
Step-by-step explanation:
This is the best description of what "reminiscent pauses" means in the sentence. In this passage, we learn that Harmon remembers some event from the past. However, while he describes this event, he pauses. The narrator describes these pauses as "reminiscent." This implies that Harmon is pausing in order to remember something.