Answer:
because they might not spend a lot of time doing another thing as much as how much time they spend doing what they're good at
Ending the adjectives with -ed is not needed, so those answers are out. As for the numbers, the rule is usually that numbers one through nine are spelled out whereas number 10 and up are written in numbers. That said, you do not hyphenate the number with the word, so four-letter word would be correct.
Answer:
I think the one that would make the most sense would be C, what's the point of this story or essay?
Explanation: