(b) They only pulled that stunt on art that was already behind suitably-protective covers. (Whether the stunt is effective or not, they weren't putting artwork at risk: just temporarily disrupting the operation of galleries, and getting themselves arrested.)
(b) They only pulled that stunt on art that was already behind suitably-protective covers. (Whether the stunt is effective or not, they weren't putting artwork at risk: just temporarily disrupting the operation of galleries, and getting themselves arrested.)
(c) This is completely off-topic.