Which IAM role do you use to grant AWS Lambda permission to access a DynamoDB Stream?

Which IAM role do you use to grant AWS Lambda permission to access a DynamoDB Stream?
A . Dynamic role
B . Invocation role
C . Execution role
D . Event Source role

Answer: C

Explanation:

You grant AWS Lambda permission to access a DynamoDB Stream using an IAM role known as the “execution role”.

Reference: http://docs.aws.amazon.com/lambda/latest/dg/intro-permission-model.html