During her evening spanish language exam, janica so easily remembers the french vocabulary she studied that morning that she finds it difficult to recall the spanish vocabulary she rehearsed that afternoon. her difficulty best illustrates:
a) the spacing effect.
b) proactive interference.
c) source amnesia.
d) retroactive interference.

b) Proactive interference

Explanation:

In psychology, the term proactive interference happens when we can't learn a new task because the memory of an older task gets in the way. In other words, what we already know interferes with our process of learning new information.  

In this example, Janica remembers the French vocabulary she studied that morning (earlier in the day) and she finds it difficult to recall the spanish vocabulary that she rehearsed earlier. The first memories made (french vocabulary) are interfering in her process of learning and recalling new information obtained later. Therefore this difficulty best illustrates proactive interference.

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