Mamie has not paid attention to the incoming information so it was not encoded into the long-term memory.
Answer: Option B
Step-by-step explanation:
Long-term memory is the memory that stores information indefinitely. When something is observed or learned and noticed, it is the long term memory that stores the information.
Since Mamie did not pay attention to the mural, it did not get registered in the long term memory. Mamie may have noticed the mural but the information was conveyed to the short term memory that lasts for a few seconds. Since the mural was not registered in the long term memory, Mamie does not remember it.