Which sequence correctly describes early language development with approximate ages from birth to age 3?

Which sequence correctly describes early language development with approximate ages from birth to age 3?

• A. Cooing around 6 months; babbling around 12 months; first words around 24 months; holophrase around 3-4 years.
• B. Cooing (vowel sounds) around 2 months; babbling around 6-10 months; first words around 12 months; holophrase around 12-18 months; rapid vocabulary growth by age 2-3.
• C. Cooing around 1 month; babbling around 3 months; first words around 6 months; holophrase around 9-12 months.
• D. Cooing around 3-4 months; babbling around 9-12 months; first words around 18 months; holophrase around 2 years.

Answer: (B)