Jeffrey Has an Online Store That Caters to Collectors of Antique

Jeffrey has an online store that caters to collectors of antique pins based on comic book characters. His audience is small, but dedicated. If you were advising Jeffrey about his online advertising sales, which of the following would be the best strategy considering Jeffrey's audience?

A) Use the Google Content Network for niche placements.
B) Use Google AdWords with hundreds of comic-book based keywords.
C) Use the Google Content Network with automatic placements based on hundreds of comic-book based keywords.
D) Use Google AdWords for search marketing.