Suddenly Ollie was a freight train racing into the house meaning

The full question i believe is "Suddenly, Ollie was a freight train racing into the house". Is the underlined phrase a simile or metaphor"? My answer to this question is Metaphor.

Explanation:

Metaphor is a figurative language  in which a thing is regarded as symbolic of something else. In this case 'was a freight train' is symbolic of something else. Metaphor has to do with applying a word or phrase to an object or an action that is not literally applicable.

When a Metaphor is used, the statement does not literally make sense, but then makes sense when the similarities between the two things becomes clear or when the individual understands the connection.

if this is a true or false question its true

in my opinion, ap calculus was the most difficult. i often struggled with it a lot. however, i have gotten a lot better.