The first United States lawn tennis game was played ()

A. Intelligence includes word understanding and problem solving.
B. More intelligent children usually do better in school.
C. The French Ministry of Education was charged with the development of first intelligence tests.
D. Intelligence is related with age.

A. can not be solved because situation is very cruel
B. can be solved because twins will be separated
C. can not be solved unless the twins are forced to live in an ordinary environment
D. can be solved if the adults communicate with them more often