Answer:
CExplanation:
"Let us understand throughout this campaign that his motives and mine are sincere."
The evidence that is most relevant to Nixon's claim is C. "Let us understand throughout this campaign that his motives and mine are sincere."
What is a Claim?This refers to the assertion or statement about something which may or may not be true.
Hence, we can see that from the claim of Richard Nixon, he states that his spending plans are superior to Kennedy's and this is shown in option C where he said "Let us understand throughout this campaign that his motives and mine are sincere."
Read more about claims here:
https://brainly.com/question/17494279