“If young adults can’t afford health insurance policies available in 2014 under the health care law, state insurance officials are worried they won’t buy them. And that could drive up the cost of insurance for the mostly older, sicker people who do purchase coverage. That’s a potential problem even in states like California and Rhode Island, which are moving ahead to carry out the law, state officials told representatives of the Obama administration Friday at a meeting of the National Association of Insurance Commissioners.”