Use reasoning to lead to the answer of the following question:
What can live in salt water?\nOptions:\n- (A) otters\n- (B) spider\n- (C) amoeba\n- (D) clam\n- (E) alligator\n- (F) ducks\n- (G) goldfish\n- (H) voles

(D)
Mollusks live in most terrestrial, freshwater, and marine habitats.

Mollusks tend to be shore-dwelling creatures.

Clams tend to be shore-dwelling creatures and can live in both sea and freshwater.

.

Thus, the answer is (D)