Which is true of the course of adhd? many adults have adhd but were never been diagnosed in childhood. the majority of children with adhd outgrow their problems before adolescence. signs of adhd are unlikely to be present before the age of two. adhd does not develop until school age.

Option A,

Explanation:

As per Adler, there are several adults who have ADHD but they were never diagnosed with ADHD when they were kids. This is a very common case with girls

In a general way, parents focus more on boys that are noisy than the girls who are silent but become inattentive and focus less.  

Thus, most of the adult women have been never diagnosed with ADHD during or before teenage.

Hence, option A is correct

the answer is a or when it says crossing over

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.