Stormbreaker,a New Spy Movie,details the Story of Alex Rider Who,after

Stormbreaker,a new spy movie,details the story of Alex Rider who,after the death of his uncle,is recruited as an M16 spy.Armed with a special set of gadgets,Rider's mission is to save millions of lives.In James Bond fashion,the Cross pen serves as one of the key gadgets in the film.The maker of the Cross pen paid to have its pen featured in this movie.This is an example of:

A) advertising.
B) a sales promotion.
C) paid-for public relations.
D) product placement.
E) lobbying.