1. Now, select two people from Jia, Yi, Bing, and Ding to participate in an activity. The rules are: If Jia goes, then Yi also goes; If Bing does not go, then Yi does not go; If Bing goes, then Ding does not go. The two people who finally go to participate in the activity are ( ).
(A) Jia, Yi
(B) Yi, Bing
(C) Jia, Bing
(D) Yi, Ding
【Answer】B
【Question Type】Logical Reasoning, Contrapositive Proposition
【Analysis】In logical reasoning, if the original proposition holds, then the contrapositive proposition also holds.
（1）If A goes, then B goes; contrapositive: If B does not go, then A does not go.
（2）If C does not go, then B does not go; contrapositive: If B goes, then C goes.
（3）If C goes, then D is unwilling to go; contrapositive: If D goes, then C does not go.
From (2), we can see that the answer is B.
The question requires two people to go. We can use the assumption method. If A goes, then B goes, and if B goes, then C also goes. Three people going is a contradiction, so A does not go. If C does not go, then B does not go, leaving only D to go, which is also a contradiction, so C goes. If C goes, then D does not go. From the requirement that two people go, we conclude that B must go. Therefore, the answer is $\mathrm{B}$, C and B go.