What does the experiment with the bilingual infants, described in this week's lecture, demonstrate? environment can enhance the executive function there are no differences in the executive function between bilingual and monolingual infants. environment can only influence executive function during infancy environment can impede executive function?

It demonstrates that Environment can enhance the executive function.
Infants who grow up experiencing two different languages are much more likely to become fluent in those two languages rather than the people who learn the second language after they grew up. This happen because those who learnt it through the environment has more chance to applicate the language directly compared to those who learn it in their adults.