Infer the meaning of the word Impugn based on the context clues provided in the paragraphs.
Paragraph 1 (Character Reaction): He cast doubt on her motives, suggesting she wasn’t being truthful.
Paragraph 2 (Cause and Effect): Because the committee questioned the report’s honesty, they challenged the authors publicly.
Paragraph 3 (Contrast): While some trusted her claims, others openly attacked her credibility.