Although Federal District Courts Are Theoretically Bound by Supreme Court

Although federal district courts are theoretically bound by Supreme Court precedents,they sometimes deviate because

A) the facts of a case are seldom precisely the same as those of similar cases decided by the Supreme Court.
B) federal judges may misunderstand the Court's judicial reasoning or position.
C) ambiguities or unaddressed issues in Supreme Court rulings give lower courts some flexibility in deciding cases.
D) of all these factors: the facts of a case are seldom precisely the same as those of similar cases decided by the Supreme Court; federal judges may misunderstand the Court's judicial reasoning or position; and ambiguities or unaddressed issues in the Court's rulings give lower courts some flexibility in deciding cases.
E) None of these answers is correct.