Once nominated by the president, cabinet appointees (such as the secretary of defense) must be and can be

The answer is: Confirmed by the senate; fired without the senate's approval.

The purpose of the confirmation is to give enough time for the senate to do a background check on the cabinet appointees and decide whether to vote for their appointment or not. If after the background check the senate found something wrong with the appointees, the senate can fire the appointees through voting.

b, public works good luck

the best description of postwar writers might be progressive.

following the war, writers showed a tendency to work on artistic or social matters rather than political themes. while postwar literature may not have been the greatest period of english literature, the themes provided excellent critics a high number of novels. such examples include anthony burgess, anthony powell and frank kermode, all of which can be placed under the progressive view.