参考答案

正确答案：D
解析：St Thomas Aquinas referred to prudence as the“rudder virtue”，the one that“steers” the others． Without it，we are like someone adrift in a boat，tossed in this direction or that by the wind，the waves，and the cur- rent．This，the“prudent”person is one who never“rocks the boat”and is．．．“rudder” 为“steering device on a ship or vehicle，”驾驶；“rock the boat”为“do harm”破坏。