I think that is D but i am not sure that is the help i can give you.
HOPE THIS HELPS!!
(1) The planes have to undergo rigorous safety checks. (2) You may have to undergo disappointment and failure before experiencing success. (3) It took me some time to undergo the metamorphosis from teacher to lecturer. (4) Most patients undergo some sort of drug therapy for leukaemia
Usually due to not paying workers enough, especially using workers in developing and poor countries which are desperate and will do work for very little. Big companies can sell cheap clothes but still make a huge profit from paying workers little.
The answer is going to be true
