Answer:
c
Step-by-step explanation:
because yes i did jajajjaja
C. CONCAVE
A mirror with a reflecting surface that caves inward is said to be CONCAVE.
Clue: caves inward. )(
Convex has an outline of surface that cave outward. It is like the outside of the circle or sphere. ()
There's more than one way to combine them really
but an obvious one will be