Answer:
Option A => memory.
Step-by-step explanation:
The aspect relating to learning new things is one of the important concept in Psychology. Many Psychologists have study this and one of the Psychologists we are going to mention here is Albert Bandura.
Albert Bandura worked on learning through the act of observation through the use of Bobo doll experiment . That is in order to learn things you just need to observe them.
The four elements Albert Bandura mentioned in his theory of the necessary components of observational learning are; attention, imitation, motivation and memory.
It was due to memory failure(forgetting) that is unable to retrieve stored information that caused the disaster.