A 40-year-old man and his 7-year-old son move to a country where they have to learn a new language. Compared with his son, the 40-year-old man will a. require less active processing to acquire the syntax of the new language

b. overregularize more often

c. learn new vocabulary at a faster rate by using techniques such as fast mapping

d. learn the grammar of the new language more slowly but ultimately acquire the language better

e. have more difficulty learning to produce phonemes that do not exist in his native language