When a Credit Card Company Offers Different Services with Its

When a credit card company offers different services with its card, like travel insurance for air travel tickets purchased with the credit card or product insurance for items purchased with the card, the credit card company is trying to

A) create a barrier to entry for competing firms.
B) create a perfectly competitive market in which to sell its credit card.
C) differentiate its credit card from those offered by other companies.
D) shift the demand curve for competing firms to the right.