Here are the instructions from IRS for line 10,11,12 "As a paid tax return preparer, you must exercise due diligence to determine whether a taxpayer meets all of the eligibility requirements for the CTC/ACTC/ODC. Lines 10, 11, and 12 only ask three specific questions about eligibility for the CTC/ACTC/ODC. However, your client must meet all of the eligibility requirements for claiming the CTC/ACTC/ODC. Therefore, your client may not claim the CTC/ACTC/ODC unless all of the eligibility requirements for these credits are satisfied, regardless of the answers to the questions on line 12." so I think all three have to be answered.