Katrina studied the Russian language in high school. Although she was 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 relearn

Explanation:

The information and all related to the Russian language was already on Katrina's mind, she only needed to recollect and use it. When she got in touch once again with the language, her brain processed the information and made her remember the learning she made during high school. According to philosopher David Hume, all we know is dormant, and need just an external strength to be revived. That's what happened with Katrina and the Russian language.

parable of the tares

explanation:

answer; the edward snowden leaks of nsa classified material;