A.) He can't bring himself to arrest his old friend. Twenty years before, the two friends decided that they would meet there at the restaurant whatever the conditions of their health or wealth. When Bob arrives at the restaurant, he finds that his best friend has turn into the most wanted man in 3 states. He still loves his friend, so he doesn't want to arrest him. Instead, he sends a plainclothes man to do the job.
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Adverb phrases describe why something is done, or how, or where: they gave more information about the circumstance.
Here it's <span>C. During our second visit - it gives the information about when the relevant action happened. </span>
Foreshadowing and metaphor because it foreshadows what will happen next (how they both got attacked by bob)
