thE pAssAgE is mAinly ABout ______.
A．thE wAys husBAnDs AnD wivEs CAn promotE EACh othEr's hEAlth
B．husBAnD's or wiFE's proBABility oF FuturE hEAlth
C．EFFECts oF CouplEs EmploymEnt AnD hours oF work on EACh othEr's hEAlth
D．husBAnD AnD wiFE inFluEnCE EACh othEr in vArious wAys