Yolanda and steve want their son, manny, to attain full proficiency in english and spanish. to achieve this goal, manny’s mastery of the second language should begin
a) in early adulthoodb) in early adolescencec) in late adolescenced) sometime in childhood

sometime in childhood

Explanation:

During childhood, learning of a second language is easier. Children begin to understand a second language in 3 to 7 months after exposure to this language. In two years, they can begin to communicate fluent in the second language. Second language is easily learnt by children than adults due to the fact that the window of opportunity for language learning and mastery is still much open to them.

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.