Kennedy claims in this excerpt is that basically nothing is impossible. The things that are considered extremely difficult to reach are possible if you are willing to do them. The capability or the limits of a person are only established by him or herself.
I'm not 100% sure but I think it is A. Sorry if it is wrong.
Answer:
C, Is is the answer.
Explanation:
Would be is past tense,
Were too is past tense
Is is present tense and so is the sentence
Are does not sound right in the sentence
in sentences like i like pizza, burgers, and fries.
The answer to your questions is D.
I hope this helps! <3