在“齿牙完坚”中，“完”之义为（）

A.完整

B.完结

C.完全

D.完了

Life insurance, before available only to young, healthy persons, can now be obtained for quite a large proportion of the elderly population, and, sorry, even for pet animals.

A．before young, healthy persons available only,

B．available only to young, healthy persons before,

C．available only to persons young, but more healthy,

D．before young and healthy persons only available to,