What refers to changes in art style or particular ideas that define the work of a group of artists at a certain time? art movement art period art momentum art type

Art movement

Explanation:

An artistic movement is a trend or style in art with a common philosophy or goal, followed by a group of artists over a limited period of time (usually for a few months, years or decades).

The concept of "artistic movement" was especially important in modern art, where each consecutive movement was regarded as avant-garde.

i would think b and c

.                                       sorry i just need points