Which statement is true according to the passage？
A:People generally understand about 50 pe
选项：

A:Which statement is true according to the passage？
A:People generally understand about 50 percent of what they hear.
B:We often spend much more time in judging the speaker than in trying to understand what he or she is saying.
C:It helps us to understand if we think faster than most people speak.
D:There are four steps in listening: hearing, interpreting, evaluating and responding.