Question

Which of the following research has NOT shown to be beneficial to a child's second language acquisition? O youth-the younger the child, the easier for him to learn a second language mastery of grammar of the child's first language continued development of the child's first language being surrounded by native speakers of the second language Save & Next Skip​

Answer 1

Explanation:

mastery of grammar of the children first language

Answer 2

Explanation:

Among the various options given in question statement the correct option is the second one which is  mastery of grammar of the child's first language. This research has not been validated at any stage, because mastery of one language dos not guarantee that the child will become equally good in the second language. Rather for that development other points mentioned in question statement are valid