Take part voluntarily (3,2)
I believe the answer is:
opt in
(Other definitions for opt in that I've seen before include "Join voluntarily" , "Choose to be included" , "Choose to participate" , "Choose to take part" , "be involved voluntarily" .)
I believe the answer is:
opt in
(Other definitions for opt in that I've seen before include "Join voluntarily" , "Choose to be included" , "Choose to participate" , "Choose to take part" , "be involved voluntarily" .)