A SysOps Administrator is creating additional Amazon EC2 instances and receives an InstanceLimitExceedederror.
What is the cause of the issue and how can it be resolved?

A. The Administrator has requested too many instances at once and must request fewer instances in batches.
B. The concurrent running instance limit has been reached, and an EC2 limit increase request must be filed with AWS Support.
C. AWS does not currently have enough available capacity and a different instance type must be used.
D. The Administrator must specify the maximum number of instances to be created while provisioning EC2 instances.