[Solved] A company has two AWS accounts: Account A and Account B. Account A has an IAM role that IAM users in Account B assume when they need to upload sensitive documents to Amazon S3 buckets in Account A. A new requirement mandates that users can assume the role only if they are authenticated with multi-factor authentication (MFA). A security engineer must recommend a solution that meets this requirement with minimum risk and effort. Which solution should the security engineer recommend? A) Add an aws:MultiFactorAuthPresent condition to the role's permissions policy. B) Add an aws:MultiFactorAuthPresent condition to the role's trust policy. C) Add an aws:MultiFactorAuthPresent condition to the session policy. D) Add an aws:MultiFactorAuthPresent condition to the S3 bucket policies. Confounding Variable: A variable that influences both the dependent and independent variables in a study, possibly misleading the results if not controlled. Control Group: In experimental research, the group of subjects that does not receive the treatment or experimental manipulation, serving as a baseline to compare the effects. Experimental Group: is the group in an experiment that receives the variable being tested, allowing researchers to observe the effects of that variable. Sexual Thought: Mental reflections or fantasies about sexual activity or erotic situations.