The sentence that avoids plagiarism and uses Lincoln's ideas is, ''He wanted people to act with firmness in the right, meaning confidence and faith in their moral compass''. (Lincoln)
Plagiarism is the copying or theft of someone's work and claimed as own. The expressions, ideas, thoughts, topics, etc. can be copied. It includes the violation of ethics and integrity.
The first option bets represent the idea and are without plagiarism as the words are rephrased and do not contain words the same as the speech. The phrases are paraphrased properly and accurately express his ideas.
Therefore, option A. He wanted people to act with firmness in the right, meaning confidence and faith in their moral compass. (Lincoln) is the correct option.
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