A sponsor submits an Investigational New Drug (IND) application for a Phase 1 study. The FDA issues a clinical hold 25 days after submission. Which of the following is the MOST likely reason for the clinical hold?
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A
The proposed patient population is too small to achieve statistical significance.
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B
The Investigator's Brochure is found to be misleading or materially incomplete.
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C
The sponsor has not finalized the commercial manufacturing process.
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D
The Phase 3 clinical trial protocol has not yet been submitted for review.