The Mailbox Rule

The mailbox rule:

A) has a lineage tracing back less than 50 years to the English courts.
B) states that the solution is not the same as the rationale for the rule.
C) states that the acceptance is not effective until received by the offeror.
D) places the burden on the offeror.
E) states that the offeree alone has the power to fix the moment of effectiveness.