Read this excerpt from William Shakespeare's sonnet "Shall I compare thee to a summer's day."

Shall I compare three to a Summer's day?
Thou art more lovely and more temperate:
Rough winds do shake the darling buds of May.
And summer's lease hath all too short a date

Why does Shakespeare have his speaker use the phrase summer day when describing the beloved?

A. to show that his speaker is in love and trying to persuade their intended with beautiful words
B. to show that love, like summer, is a brief part of every life and one that doesn't last all year
C. to persuade his readers that Shakespeare once loved a beautiful and kind woman
D. to show that love runs hot and cold, much like a thermometer taking temperature