Mr. henley said, "in the rat race we call life, only the strong will survive". what is he referring to?

Mr. Henley refers to survival of the fittest in the rat race. This means that those who are ill equipped or unable to cope will lag behind and eventually lose. The rat race refers to an endless and pointless pursuit.

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D. Even before the event.

Explanation:

Given that sentence fragment is a form of sentence that is without a subject or verb or sometimes both.

Therefore, in this case, the correct segment fragment is "Even before the event." This is because it contains subordinating conjunction which is "Even" thereby asking the question "what happens?"