How can dependence be psychological?

Mary has spontaneously decide to make a meal for friends. she is beginning to prepare fin fish and realizes she wants to also prepare a hearty dish ready to serve at the same time. what should she prepare? a: rice which take 20 minutes b: past which takes 15 minutesc: baked potatoes, which take 50 minutes. d: grilled garlic bread, which takes 5 minutes. e: boiled dumplings, which takes 17 minutes.