whAt is thE pAssAgE mAinly ConCErnED ABout
A．it rEvEAls thAt inEquAlity in AmEriCA in thE FiElD oF hEAlthCArE.
B．AmEriCAn pEoplE's AttituDEs towArD thEir hEAlth.
C．it tElls us thE hEAlthCArE ConDitions in AmEriCA.
D．why thE AmEriCAns hAvE not mADE morE DrAmAtiC striDEs in liFE ExpECtAnCy.