The act of taking refuge from the Jinns as mentioned in Q. 72:6 is that
They could harm the believers
People benefit from their protection
They would increase such people in fury
people may turn to be their partners
Correct answer is C
"And verily there were men amongst mankind who took shelter with the males among the Jin but the (the Jin) increased them (the mankind) in sin and transgression". Q. 72:6.