Peter's mother is a native Spanish speaker, and his father is a native English speaker. He hears both languages equally often and is addressed in Spanish by his mother and in English by his father. If Peter is a typical toddler, how will his language skills be affected by this early experience?
a. He will be able to understand one language but not the other.
b. His cognitive skills will lag behind those of similar-aged monolingual children.
c. He will be able to differentiate between both languages.
d. He will often mix the two languages together and be unable to differentiate them.
