Answer: A

Option A is the act of mistakenly stealing a credit card and using it, which constitutes the crime of theft. During Wang's move, the things in his home were not lost items and were still in Wang's possession. Therefore, A is involved in the theft of credit card usage.

Option B is correct: credit card robbery + use = robbery.

Option C is correct. The card was swallowed and was still in the possession of the victim. Li committed theft and used the credit card and was guilty of theft.

Option D is correct. If you steal a credit card and use it on a natural person, the part that is not overdraft is the crime of theft, and the part that is overdraft is the crime of credit card fraud and is subject to a concurrent fine.