[求助]GRE GMAT LSAT P80 逻辑~

Most parents who are generous are good parents, but some self-centered parents are also good parents. Yet all good parents share one characteristic: they are good listeners.

 

If all of the statements in the passage are true, which one of the following must also be true?

 

A. All parents who are good listeners are good parents.

B. Some parents who are good listeners are not good parents.

C. Most parents who are good listeners are generous.

D. Some parents who are good listeners are self-centered.

E. Fewer self-contered parents than generous parents are good listeners. 

 

The correct choice should be D~, but I voted for B. Actully, I could not tell the difference between B and D.

Open to discuss.