Answer:
Thus, the correct answer is - Proactive interference.
Step-by-step explanation:
Proactive interference is a type of interference effect that involve the previous memories to hold back to form new memories and retain them. This include various prior retained memories such as old mobile numbers, address, and other material.
In this question Roberto is experiencing the same proactive interference by having difficulties to retain new address and still remember the old one.
Thus, the correct answer is - proactive interference.