The anser is C: Your father lies five fathoms under the sea.
Fathom is a unit for measuring the depth of water, equal to 1.8 meters or six feet. The verb in "thy father lies" means being in a flat, horizontal position. In the sentece B, in "your father has lied", the verb lie means saying something that is not true in order to deceive someone. A: The fathom unit is not for measuring heights. D: diving is not in a lying position.