The lines among the options which contains a caesura is "Cease then, my song, cease the unequal lay." (option D)
What is a caesura in poetry?
In poetry, caesura refers to a pause or even a stop applied to a line. In other words, the line is interrupted either at the beggining, the middle, or the ending.
That interruption can be done by using punctuation or by adding a phrase or clause. One example of initial caesura (at the beginning) would be: "Look! The sky is no longer dark."
With the information above in mind, we can choose option D as the one containing a caesura. It is found in the addition of the phrase "my song" and the commas that set it off. The commas and the phrase pause line.
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