Which of the Following Students Provides the Most Accurate Information

Which of the following students provides the most accurate information about bilingual people and monolingual people?

A) Molly: "On every cognitive skill that has been measured so far, bilingual people consistently score higher than monolingual people."
B) Liam: "On every metalinguistic task that has been tested so far, bilingual people consistently score higher than monolingual people."
C) Ross: "Bilingual people are more likely than monolingual people to develop dementia at a young age."
D) Amelie: "Bilingual people are more likely to notice some pragmatic components of a language task."