Which statement is true concerning user-defined data types? O You can only create one instance of your data type.
O You cannot include other user-defiend data types.
O You can include other user-defined data types.
You cannot change default values.

I think its "You can include other user-defined data types" not a 100% sure though

Explanation:

by trying your best others ^_^

but don't try sending them fake answer, it must to be real answer.

the reason why you must not send them fake answer cause the experts and the questioner will moderate you and if they find out its fake they will report your to the owner of this website which its called

explanation:

i want to say d but i could be wrong however it is organized if that could happen..

hope it could