Question

Two adjacent angles whose exterior sides are opposite rays are complementary.

always
sometimes
never

Answer 1

opposite ray means a total of 180 degrees between the two angles, amd complementary angles equal 90.
so option C is correct
hope this helps

Answer 2

we know that

Two angles are Complementary when they add up to
`90` degrees and two angles are Supplementary when they add up to
`180` degrees

f the exterior sides are opposite rays, then a straight line forms and you have the two angles add to
`180` degrees

So

the angles are supplementary and not complementary

therefore

the answer is the option

Never