What is the meaning of the underlined phrase in this excerpt from sonnet 126 by william shakespeare?
o thou, my lovely boy, who in thy power
dost hold time's fickle glass, his sickle, hour;

a. time is changeable and inconstant.
b. time and glass are immoral.
c. time is liable to break like glass.
d. time, like the glass or mirror, always reflects the truth.

cassius, casca, and their allies plant false documents to manipulate brutus to join their cause to remove caesar. after doing so, they visit brutus at night in his home to persuade him of their views. there they plan caesar's death. brutus is troubled but refuses to confide in his devoted wife, portia. on 15 march, caesar's wife, calpurnia, urges him not to go to the senate. she has had visionary dreams and fears the portents of the overnight storms.