John Carter has attained his FRA and has been employed by ABC Inc. for 35 years. John has decided to stay employed and not apply for monthly Social Security cash benefits. Because his employer has reduced benefits under the employees' group health plan, John plans on applying for Medicare coverage. Which one of the following is a correct statement about John's Medicare coverage? John will be entitled to basic hospital insurance benefits, but he is not eligible for supplementary medical Insurance coverage. Since John is at least 65, he is eligible for both the basic hospital and supplementary medical insurance coverages. John is not entitled to any Medicare insurance coverage because he is continuing to work. John is entitled to Medicare insurance coverage, but his benefits will be reduced by a percentage of his compensation