Answer:
To me his words mean that although he may have been racing against people with more experience, he didn't feel at a disadvantage. He felt as though he was their equal, because age doesn't always matter.
I and III only because they don't make sense
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The importance of knowing the key dimensions of extreme natural events allow us to gauge the amount of preparation we need to do. The dimensions of extreme natural events are the severity of the natural event and its likelihood. These two provide a risk assessment that will tell us which disasters to prevent to the most.