An extended metaphor a) has not been used in poetry for at least 75 years

b) combines simile, personification, and metaphor at once

c) offers at least three metaphors throughout the poem

d) compares different things over more than two lines

An extended metaphor compares different things over more than two lines, as shown in option D.

We can arrive at this answer because:

In this case, the extended metaphor is established in more than two lines, being able to cover paragraphs and even entire texts.

More information about extended metaphor:

link

The correct answer is D

Explanation:

Extended Metaphor compares different things over more than two lines.

the answer to the problem is most likely a