If the song is not Unfolded the only way is to use Bar Settings (F5) to change the style. Since styles that have A,B,C,D are multistyles, you need to know what the C/D style is and use that for your middle chorus(es). Be sure to change it back to the A/B style for the last chorus.

The way I do it is to Unfold the song and just change the part marker(s) as desired.

R