Answer: B.
The AWS Well architected framework is based on the five pillars - Security, Reliability, Performance efficiency, Cost Optimization & Operational Excellence.
Option A is incorrect since it belongs to the Security pillar of the AWS well architected framework.
Option B is CORRECT because configuring much more CPU resources than required is not appropriate in a cloud environment such as AWS.
This method is not cost-efficient as well.
Option C is incorrect since it belongs to the Cost Optimization pillar of the AWS well architected framework.
Option D is incorrect since it belongs to the Reliability pillar of the AWS well architected framework.