An Advertising Campaign Intended to Convince Consumers to Switch to More

An advertising campaign intended to convince consumers to switch to more ecologically friendly hair care products is most likely to be effective in convincing

A) Arnold, who insists on buying whatever hair products are cheapest.
B) Bonnie, who is an active member of Greenpeace.
C) Cassandra, who strongly believes her favourite hair product is the best on the market.
D) Danae, who buys whatever hair care product she sees first.