Mr lopez takes several high cost prescription drugs. he would like to enroll in a standalone part d prescription drug plan

Part D prescription drug is a plan that provides medical beneficiaries a coverage of prescribed high drug costs

Explanation:

In U.S.A. the Medicare part D offers the beneficiaries to apply for a stand-alone high cost prescribed drugs cost coverage plan.  This plan works as an adjacent plan with the main Medicare benefit plan of an individual. Private insurance companies provide this type of plan.

It is mandatory for a beneficiary to be enrolled in a prescription drug coverage plan of Medicare to be eligible for the Part D plan. This plan is applicable on certain branded medicines.  

the answer would be a." don't hit a home run when the game is tied"