Answer:
First, walking or running into a burning building is in direct defiance of survival instinct. To do such is a gamble with one's life. Gambling one!s life to rescue a child is noble. A child is unlimited possibilities. the rescue wagers a life for the greater good.
Sentences C, D, and E all properly transition between tenses. Sentence C properly transitions from a present continuous action to another present tense action. Sentence C properly describes an event in the present based on the past. And sentence E, properly describes a chain of events using the proper tense transitions.
