Evidence suggests that decay group of answer choices occurs for all memories. accounts for the vast majority of forgetting. in combination with repression explains virtually all of forgetting. probably explains far less forgetting than interference or retrieval failure.

probably explains far less forgetting than interference or retrieval failure.                          

Explanation:

Decay: In psychology, the term decay explains that an individual's memory fades away with the passage of time. The information that is being stored in an individual's memory is therefore merely present or available for the future retrieval gradually with time and the memory strength or memory wears away.

In other words, decay occurs due to the interference process, the formation of new memory often fades away the earlier memory and vice-versa.