A participant who is illiterate wants to enroll in a clinical trial. Which approach is acceptable for obtaining informed consent?
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A
Skip the consent form since the participant cannot read it
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B
Have the participant sign an X and have a witness sign attesting to the verbal consent process
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C
Allow a family member to sign the consent form on the participant's behalf without witness
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D
Obtain only verbal consent and document it in the medical record without a signature