Matt should avoid giving his debit card to his friend because:

1. Matt has to share his PIN with his friend.
2. Matt has to give his friend his checking account number.
3. The withdrawal will not be marked on Matt’s check register.
4. The ATM will not give money from his account to someone else.

1. Matt has to share his PIN with his friend - This is a valid reason to avoid giving his debit card to his friend. Sharing his PIN with someone else can compromise the security of his debit card and his financial accounts.

2. Matt has to give his friend his checking account number - This is another valid reason to avoid giving his debit card to his friend. By sharing his checking account number, Matt is providing access to his bank account, which can be risky.

3. The withdrawal will not be marked on Matt’s check register - This is a potential issue if Matt maintains a check register to track his transactions. If the withdrawal is not recorded, it could lead to confusion and difficulty in managing his finances.

4. The ATM will not give money from his account to someone else - This is an inherent feature of ATMs. They are designed to dispense money only to the account holder, and it is important to respect this security measure. Giving his debit card to his friend means allowing someone else to use his account for withdrawals, which could lead to unauthorized access and potential financial loss.