Which of the following is a true statement regarding the developmental milestones of a 30-month-old child?

• A. A 30-month-old child usually reads simple storybooks independently.
• B. A 30-month-old child typically begins to use two- to three-word sentences to communicate.
• C. A 30-month-old child is generally able to solve complex math problems such as $x^2+5=10$.
• D. A 30-month-old child is expected to consistently ride a bicycle without training wheels.

Answer: (B)

Verified step by step guidance

1. Understand the typical developmental milestones for a 30-month-old child, focusing on language, cognitive, and motor skills.
2. Recognize that at around 30 months (2.5 years), children usually begin to combine words into simple two- to three-word sentences, which is a key language milestone.
3. Evaluate the other options by comparing them to typical developmental expectations: reading independently, solving complex math problems, and riding a bicycle without training wheels are skills that develop much later.
4. Recall that complex cognitive tasks like solving algebraic equations and advanced motor skills like riding a bike without training wheels are not expected at this age.
5. Conclude that the statement about beginning to use two- to three-word sentences is the accurate developmental milestone for a 30-month-old child.