Prior to a first public hearing Tuesday on a proposed “public option” for health insurance, a chorus of voices representing a range of industry players sounded off in more than 200 testimonials filed with the General Assembly. Although major insurers are funding the majority of the efforts against the Democrat’s public-option proposal, Senate Bill 842, smaller sectors of the state’s economy joined the opposition chorus in testimony. A government-endorsed and subsidized health insurance plan threatens the livelihoods of Connecticut’s insurance brokers, who provide a vital service in educating consumers, said Gerry Luczak, owner of a small insurance agency in Rocky Hill.