Answer: I would disagree
Step-by-step explanation:
Economics is the study that defines about products and service that are produce, regulated, consumed and distributed. Economic agents are the factors that regulated the field of economic along with the behavior and link displayed by customer and firms.
They maintain rationality through making decision based on possible growth,cost and benefits as per economic knowledge.
Therefore, roommate's statement is incorrect that economic field assume of making best decision rather the try to make possible beneficial decision considered all the factors.