C. They suggest that it is a dangerous enemy. I hoped this helped!
I had to look for the missing passage and the options and here is the answer:"Here is New York" is a book that was written by E. B. White and Roger Angell. And based on the passage taken from this book, the effect that the symbol has on the meaning on this passage is this: The commuter is the queerest bird of all. The suburb he inhabits has no essential vitality of its own and is a mere roost where he comes at day’s end to go to sleep. (This answer is based on the actual options attached to this question).
