The most probable answer to this and the most likely on would be D. salvation through good deeds.
Puritans heavily believed in the concept of predestination. They also have faith and original sin is also part of Puritanism. Though they absorbed some characteristics from other religions, salvation through good deeds isn't one of them. This would entirely be a direct defiance to being predestined in the first place. Believing that salvation through good deeds is possible, then they would be destroying their own beliefs about predestination.