Answer:
C. And trains pass with windows shining / Like a smile full of teeth
Step-by-step explanation:
Simile is a figure of speech that tends to compare two different things in a unique way. It tends to show that a particular thing is exhibiting a similar characteristics upon which the other thing it is being compared it.
In the options given, And trians passes with windows shinnig like a smile fullof teeth, this shows that the train windows exhibit the characteristics of a shinning teeth found in humans hence the comparison.