An Amazon Alexa Skill with account linking receives the following request from Alexa:

Before responding to the request, how should the Alexa Skill Builder verify that the request came from a user with a valid service account?

A. Confirm that apiAccessToken verifies that the user is in the resource server and that the token has not expired.
B. Confirm that accessToken verifies that the token has not expired and that the user is the resource owner.
C. Confirm that accessToken verifies that the user is in the resource server and that the token has not expired.
D. Confirm that apiAccessToken verifies that the token has not expired and that the user is the resource owner.