How do health maintenance organizations (hmos) and preferred provider organization (ppos) differ?
a: hmos provide health insurance for older adults; ppos provide insurance for children.
b: hmos provide preventative health care options within a network of preapproved providers; ppos have agreements with provider to provide care at a reduced amount.
c: hmos are considered to be better than ppos
d: hmos will be eliminated because of the affordable care act (aca); ppos will not