Which among the following is most likely to learn to speak a new language just as fluently as a native speaker? a. 10 months
b. 10 years
c. a very motivated adult
d. a) and b) are both correct
e. a) and b) and c) are all correct

At what age do you learn to speak? Explanation: The ability to learn a new language, at least grammatically, is strongest until the age of 18 after which there is a precipitous decline. To become completely fluent, however, learning should start before the age of 10.i hope this helps

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Answerhomones;