Why did many of president kennedy's "new frontier" programs fail?

The correct answer was D.) They did not gain support amongst many Congressional conservatives.

This is USA testpreps explaination..."Many of JFK's "New Frontier" programs did not pass out of Congress because they did not gain support amongst many Congressional conservatives. There are many explanations for this- some considered him too liberal, others questioned his experience- but it should be noted that most of this programs DID find success following his assassination and during the presidency of his successor, Lyndon B. Johnson."

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.

do u have any answer choices?