One of the arguments against "the younger the better" statement in SLA (Second Language...

✂️ a) adults rarely reach native speaker proficiency

✂️ b) there are children who do not learn a second language

✂️ c) children take longer to learn a second language than adults do

✂️ d) children can learn three or four languages at the same time with no effort

✂️ e) in many multilingual communities, people learn to speak more than two languages during adulthood

Responda: One of the arguments against "the younger the better" statement in SLA (Second Language Acquisition) is that: