An Implication of the Hypothesis Leading to the Discovery of Neptune

Multiple Choice

An implication of the hypothesis leading to the discovery of Neptune was:

A) Examination of the orbit of Neptune would reveal the existence of a ninth planet.
B) A powerful telescope could detect a previously unseen satellite of Uranus.
C) The gravitational field of Uranus caused perturbations in the orbit of Saturn.
D) Directing a telescope to a particular region of the sky would reveal a new planet.
E) The combined mass of Neptune and Uranus was less than the mass of Saturn.