The culmination of an event is the high point of the event. the finale. the end result, or most important part. the center point and main focus.

the corporations allowed investment without risk of personal property, fueling the growth of new businesses.

i am not 100   percent sure but i do know that hitler was burned to death with gas so that makes me think it is d. because they were under his control if they fail or not do as told they will be killed but i could be wrong hope this