Answer:
A. People should publicly declare their grievances before taking drastic action.
Step-by-step explanation:
The sentence "To prove this, let Facts be submitted to a candid world" implies that the authors of the Declaration of Independence are presenting evidence to support their claim of "repeated injuries and usurpations" by the King of Great Britain. This suggests that they believe in publicly declaring grievances before taking drastic action rather than taking action without first making their grievances known. This is the conclusion best supported by the reasoning in the sentences you provided.