On a layer mask, what happens when you paint with black, white, or gray?

On a layer mask, what happens when you paint with black, white, or gray?

• A. Black hides the layer, white reveals; gray partially reveals for partial transparency.
• B. Black reveals, White hides; Gray fully transparent.
• C. Black increases brightness; White decreases brightness.
• D. Black makes layer fully visible; White makes layer fully invisible.

Answer: (A)