Which of the sentences below includes a metaphor?

A. “Have a great day”, he smirked as he tripped the short freshman
B. The dark clouds filled the sky and filled my heart with dread
C. That huge quarterback on the schools football team is a tank!

The sentence that includes a metaphor is:

C. That huge linebacker on the school's football team is a tank!

To identify a metaphor, you should look for a comparison between two unrelated things without using the words "like" or "as." In this sentence, the word "tank" is used to describe the huge linebacker. Since a linebacker is not literally a tank, this sentence contains a metaphor.

B. The dark clouds filled the sky and filled my heart with dread

The sentence that includes a metaphor is:

B. The dark clouds filled the sky and filled my heart with dread.