A Platypus Senses Its Prey Not Only Through Touch,but Also

Multiple Choice

A platypus senses its prey not only through touch,but also by sensing electricity.Why would the prey of a platypus generate an electrical field?

A) Muscle contractions generate an electrical current
B) The prey use the electrical fields to attract mates
C) Electrical currents are produced during metabolism
D) Electrical currents are used by the prey to repel predators
E) Some prey like fireflies emit electrical fields