"It would have been bad manners to make his guests feel foolish or uncomfortable. " "Bad manners （）

A. controls appetite and causes obvious weight loss.
B. reduces weight with some ill-effect
C. interferes with appetite and builds up fatty tissue
D. is still going through laboratory tests

A. The ability to see through things.
B. The ability to make a quick decision.
C. The ability to pick out the best one among a number of things.
D. The ability to know something by using one’s feelings.