Which of the following lines spoken by jocasta suggest that she knows oedipus's true identity?
a. "what special word was that thou heard'st from me? " (873)
b. "a servant who alone escaped with life." (782)
c. "who thou art . . mayst thou never know! " (1006)
d. "and when he comes, what meanest thou to ask? " (870)

Tides are caused by a differences in the gravitational force of the sun at different points on earth. differences in the gravitational force of the moon at different points on earth differences in earth’s gravitational field strength at different points on earth’s surfac fluctuations in the gravitational attraction between earth and the moon.