Answer:
It is easier to relearn something.
Explanation:
Katrina had studied Russian before and she retained some or most of that information in her long- term memory.
Once information is stored in this type of memory, it is not easily forgotten, though it might take some work to remember it fully.
Since Katrina retained this, it was easier for her to connect the words to her previous knowledge of it, thus making it quicker for her to comprehend it.