One word for 'a person who doubts the sincerity of others' (cynic)

The same question, asked 2 times: 21 Sep 2025 S3*, 23 Sep 2025 S3. Every wording below, oldest first.

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Question 1
21 Sep 2025 S3
82 $Choose the correct one-word substitution for the phrase in italics. "A person who is indifferent to or distrustful of human integrity or morality. "$
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Question 2
23 Sep 2025 S3
82 $Choose the correct one-word substitute for: 'A person who doubts the sincerity or goodness of others'.$
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