Answer: If Mr. Block enrolls in the stand-alone Medicare Rx plan, Block will be dis-enrolled from the MA plan.
Step-by-step explanation:
From the information given, Mr Block is currently enrolled in a MA plan which includes drug coverage.
Even if he eventually found a stand-alone Medicare Rx plan in his area which offers better coverage than what's available through his MA-PD plan, he should either stick to it because h can't run both at thesame time.
Therefore, if he enrolls in the stand-alone Medicare Rx plan, then he will have to be dis-enrolled from the MA plan.