Because the diagnosis of adhd is comparable across countries,
a. adhd is considered normal high activity level of children.
b. it is now found to be equally prevalent among boys and girls.
c. this suggests that adhd is should not be thought to be the result of intolerant parents. do. this suggests that adhd has significantly increased and spread worldwide.

Respuesta :

It's C, if you look at it this way, it could be b too. But it's c becaue it makes more sense.