
Passage: There are two types of activities organized by the community: the health type and the leisure type. According to the statistics of all the participants, the organizers found that some of the elderly in the community participated in all the health-preserving activities and some participated in all the leisure activities.
Question: Which of the followings must be true according to this statistics?
A. A.Some activities organized by the community are not attended by the elderly in the community
B. B.Some elderly people in the community do not participate in any activities organized by the community
C. C.Any activity organized by the community is attended by the elderly in the community
D. D.Middle-aged people in the community also participated in the activities of community organizations
Answer: