Which is an example of observational learning?

janice saw her older sister get into trouble for breaking curfew and decided she'll never do the same.
jacques is tempted to experiment with drugs because he is having problems at home, but then decides not to.
colleen noticed her friends tease the class loner but she doesn't participate because she doesn't care.
tyson drinks cola and eats candy bars because he likes the taste of sugary food.