Bilingual Children Perform Better Than Monolingual Children on Perceptual Tasks

Bilingual children perform better than monolingual children on perceptual tasks that involve ignoring some features of objects (such as colour) and selectively focusing on other features (such as shape) .This difference may appear because:

A) bilingual children are able to think more flexibly.
B) bilingual children become skilled at selective focus of attention.
C) monolingual children can only perceive features that their language has words for.
D) monolingual children perform better on tests of nonverbal intelligence.