Which group of Americans has the highest overall rate of suicide?

Vanya's legs bother him while he tries to sleep, and he feels the need to constantly move them into different positions. Sometimes it even causes him to wake up in the middle of the night. Vanya would be most likely to be diagnosed with

A) restless legs syndrome. B) terminal insomnia. C) REM behavior disorder. D) somnambulism.

The most commonly experienced sleep disorder is

A) insomnia. B) narcolepsy. C) night terrors. D) sleep apnea.