In the United States,companies Using Email Marketing Must Provide a Way

In the United States,companies using email marketing must provide a way for individuals to __________ email lists; in the European Union,companies may send email only to those individuals who chose to __________ email lists.

A) opt out of; opt in to
B) opt in to; opt out of
C) opt out of; opt through
D) opt through; opt in to
E) opt in to; opt through