A developer receives the following error message when trying to launch or terminate an Amazon EC2 instance using a boto3 script.

What should the developer do to correct this error message?

A. Assign an IAM role to the EC2 instance to allow necessary API calls on behalf of the client.
B. Implement an exponential backoff algorithm for optimizing the number of API requests made to Amazon EC2.
C. Increase the overall network bandwidth to handle higher API request rates.
D. Upgrade to the latest AWS CLI version so that boto3 can handle higher request rates.