What is the correct term of this OAuth component definition: A value used by the consumer―in this case, the Mobile SDK app―to identify itself to Salesforce. Referred to as client_id.

What is the correct term of this OAuth component definition: A value used by the consumer―in this case, the Mobile SDK app―to identify itself to Salesforce. Referred to as client_id.
A . Authorization Code
B. Refresh Token
C. Consumer Key
D. Access Token

Answer: C