After studying biology all afternoon, Alonzo is having difficulty remembering details of the organic chemistry material he memorized that morning. Alonzo's difficulty best illustrates

A) retroactive interference.

B) the misinformation effect.

C) proactive interference.

D) source amnesia.

A) Retroactive interference

Explanation:

In psychology, there are some processes that can interfere in our long term memory. One of them is the retroactive interference.

Retroactive interference refers to when you have some difficulties remembering a task you learned before because you now learned a new task. In other words, this new learning interferes with your old memories and the old memories are disrupted.

In this example Alonzo has studied biology all afternoon and therefore has new information now. However, this new learning is interfering with his old memories regarding the organic chemistry material he memorized that morning and his old memories are disrupted. Therefore this is an example of retroactive interference.