In Early 2003,billboards Showing Polish Actress Anna Przybylska Urging Poles

In early 2003,billboards showing Polish actress Anna Przybylska urging Poles to vote to approve the nation's membership in the European Union were seen all over Poland.These billboards and other marketing communications supported speeches given at public meetings that encouraged an affirmative vote for EU membership.This exemplified how:

A) sales promotions support personal selling.
B) other promotional elements are not as effective as personal selling.
C) advertising supports personal selling efforts.
D) advertising is more important than personal selling.
E) advertising supports publicity.