Sadira is a 2-year-old with a massive vocabulary. Her parents work with her often, reading aloud to her and encouraging her to 'read' back. How is Sadira's situation an example of social learning?

Options:
A) She demonstrates innate linguistic abilities.
B) She learns through observation and imitation.
C) She is genetically predisposed to linguistic talent.
D) She benefits from formal language instruction.