Martin can't remember who invented flush toilets because he was flirting with a classmate when his history professor described this momentous event.What likely caused his memory failure

A)  proactive interference 
B)  motivated forgetting 
C)  time decay 
D)  ineffective encoding

Ineffective Encoding

The failure to store relevant or necessary information in memory due to insufficient attention or misunderstanding.

Motivated Forgetting

A theoretical concept suggesting that people may forget unwanted information, either consciously or unconsciously, as a defense mechanism.

Time Decay

The reduction in value of an option or other derivative as the expiration date approaches.