Why is immediate cleaning necessary when acrylic paint begins drying in a brush?

Correct answer: Dried paint can harden and damage the bristles

The governing concept is that acrylic paint dries into a tough film that can become difficult to remove. If it begins drying in the brush, the paint may harden around the bristles, make them stick together, and permanently reduce the brush’s flexibility and shape. It will not turn into water, change the handle, or make the brush colour disappear. Thus option B is correct.