A System Administrator is unable to start an Amazon EC2 instance in the eu-west-1 Region...

A System Administrator is unable to start an Amazon EC2 instance in the eu-west-1 Region using an IAM role The same System Administrator is able to start an EC2 instance in the eu-west-2 and eu-west-3 Regions. The IAMSystemAdministrator access policy attached to the System Administrator IAM role allows unconditional access to all IAM services and resources within the account

Which configuration caused this issue?

A) An SCP is attached to the account with the following permission statement:

B)

A permission boundary policy is attached to the System Administrator role with the following permission statement:

C)

A permission boundary is attached to the System Administrator role with the following permission statement:

D)

An SCP is attached to the account with the following statement: