thE rEsEArCh rEviEwED in thE pAssAgE suggEst thAt _______.
A．rEmArriED mEn livE hEAlthiEr livEs.
B．unmArriED mEn hAvE thE longEst liFE spAns.
C．wiDowErs hAvE thE shortEst liFE spAns.
D．wiDows ArE unAFFECtED By thEir mAtEs' DEAth.