## Core Concept
The development of language skills in children is a complex process that involves various stages, including babbling, single-word utterances, two-word phrases, and eventually, complex sentences. One key milestone in this process is the ability to tell stories, which reflects advanced linguistic and cognitive development.

## Why the Correct Answer is Right
The correct answer, , indicates that a child is able to tell stories by the age of 3-4 years. At this stage, children's vocabulary and sentence structures become more complex, enabling them to express their thoughts and experiences in a more coherent and narrative form. This ability is a significant language development milestone.

## Why Each Wrong Option is Incorrect
**Option A:** - This option is incorrect because, at this age, children's language skills are still developing, and they typically start with single-word utterances and short phrases.

**Option B:** - This option is incorrect because, although children at this age start combining two words, they are not yet capable of forming complex narratives.

**Option C:** - There is no provided option C, but if we consider typical developmental milestones, children usually start telling simple stories around the age of 3.

**Option D:** - This option is incorrect if it suggests an age earlier or later than 3-4 years for the ability to tell stories.

## Clinical Pearl / High-Yield Fact
A memorable point for exams is that the ability to tell stories is a key language milestone that can be used to assess a child's linguistic and cognitive development. Pediatricians often use storytelling ability as part of developmental screening.

## Correct Answer: C. 3 years.