单选题 Researchers at Children's Hospital of Pittsburgh announced they had discovered ______ evidence that a virus is involved in what used to be called juvenile diabetes.
A. incessant B. compelling C. identical D. problematic

【正确答案】 B

【答案解析】[解析] 本题空格处是说发出了令人信服的证据。B项的“compelling强制性的，令人信服的，引人注目的”符合题意，如：compelling ambition and egotism．(令人信服的志气和自负)。其他三项“incessant不断的，不停的；identical同一的；problematic有疑问的”都不正确。