A person can be more lonely among men than by himself at home because______.

A．men are not lonely when they are working
B．work satisfies man' s need for solitude
C．solitude is a necessary condition of work
D．men need recreation with men alter working

A．rules agreed on to facilitate frequent meetings
B．rules that make frequent meetings tolerable
C．necessary rules for the conduct of any society
D．false standards of value fostered by society