As you sleep through the night, REM sleep _________________, whereas deep sleep (stages 3 & 4) _____________.

Select one:

a.

is less likely to involve dreaming; is more likely to involve dreaming

b.

increases relative to the other stages; decreases relative to the other stages

c.

decreases relative to the other stages; increases relative to the other stages

d.

is less likely to involve dreaming; is more likely to involve dreaming