Why do British politicians frequently portray the NHS as being endangered and vulnerable to the whims of the government of the day? a. The NHS's costs have increased at a more rapid pace than the U.S. health system. b. The Chancellor of the Exchequer has repeatedly failed to rein in costs over time. c. The NHS is highly unpopular and frustrating to the British people. d. The party in opposition often finds health policy a convenient means by which to focus criticism on the party in power