Every time he loses his wallet, ricardo cannot stop checking the back pocket of the pants he is wearing. he knows the wallet is not there, and yet he continues to put his hand in the pocket to check just "one more time." this tendency to try to solve problems in the same way every time is called

OCD

Explanation:

OCD symptoms is causing him to be repetitive

This tendency to try to solve problems in the same way every time is called A MENTAL SET.

Explanation: A mental set in Psychology is the tendency for an individual to come up with solutions based on their experiences in the past. It prevents an individual from finding solutions because they often believe the method used in the past is the only workable method. Like in the example above, Ricardo must have found his wallet at the back of his pant one time and therefore always check the back of his pant everytime he loses his wallet.

i am pretty sure it is d.