12. in which excerpt for john donne's "a valediction: forbidding mourning" does the speaker tell his wife why she should keep his departure a secret?
a. " firmness makes my circle just,/and makes me end where i begun."
b. " breach, but an expansion,/like gold to airy thinness beat."
c. " trepidation of the spheres,/though greater far, is innocent."
d. "'twere profanation of our joys/to tell the laity our love."

D. "...'Twere profanation of our joys/To tell the laity our love."

Explanation: From the given excerpts from "A Valediction: Forbidding Mourning" by John Donne, the one where the speaker tell his wife why she should keep his departure a secret is ""...'Twere profanation of our joys/To tell the laity our love" in that phrase he is implying that their happiness would be interrupted or "profaned" if she told anyone about their love and their departure.