Club Penguin is an online role-playing game for kids aged 6 to 14 operated by the Walt Disney Company. Players pay a monthly fee to gain access to all of Club Penguin's feature, although free memberships with limited access to games is also available. Disney offers free membership to Club Penguin in the hope that kids who like the game will ask their parents to pay for the full version. Disney is using which sales promotion tool?
a. Sponsorship
b. Sampling
c. Trade promotions
d. In-pack couponing
e. Premiums
ANSWER: b