Katrina studied the russian language in high school. although not fluent, she did accumulate a large vocabulary. years later she decided to go to russia, so she wanted to brush up on her vocabulary. she picked up the vocabulary much more quickly because it is easier to ; that is, to learn the material for a second time.

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.

i am pretty sure it is d.