Final answer:
The example that indicates memory problems as a result of forgetting is C) Forgetting a newly learned phone number.
Step-by-step explanation:
The example that indicates memory problems as a result of forgetting is C) Forgetting a newly learned phone number. Forgetting refers to loss of information from long-term memory. Encoding failure and interference are two reasons why forgetting occurs. In the case of encoding failure, information is not stored in our memory, while interference occurs when old or newly learned information hinders the recall of other information.