The correct answer is A) instrumental; expressive.
Sons are encouraged to engage in instrumental behavior, whereas daughters are encouraged to engage in expressive behavior.
The other options of the question were b) expressive; instrumental, c) inappropriate; appropriate, and d) appropriate; inappropriate.
Expressive behavior is verbal behavior, very expressive. Like women behavior that likes to talk, express their feelings, problems, emotions, and happiness. On the opposite, the instrumental behavior is aimed to reach something, to reach a goal, a solution, to achieve something. That is why is correct the idea that sons are encouraged to engage in instrumental behavior, whereas daughters are encouraged to engage in expressive behavior.