Read the following context and choose the best option to answer the question.
Context: They were younger , just young enough to be let out of the house on a Friday night by their parents and were letting it go to their heads . One of the girls lit up a smoke in a train carriage . As it started clouding around her head I thought " Is she really fucking doing that ?
Question: What may be a plausible fact about their age ?
Options: 
A. They are toddlers .
B. They are pre - pubescent .
C. They are young adults .
D. They are teenagers .


D