From various studies on behavioral economics, a branch of economics concerned with studying the impact of psychological factors on economic decision-making, are learned how consumers make buying decisions.
A.
From various studies on behavioral economics, a branch of economics concerned with studying the impact of psychological factors on economic decision making,
are learned how consumers make buying decisions.we have to say that from various studies on behavioral economics, we can learn / Economists can learn - Here it doesn't make sense to say are learned
B.
Consumers make buying decisions and study the impact of psychological factors on economic decision-making by learning from various studies on behavioral economics, a branch of economics.The meaning is completely off. The intended meaning is A is that we can learn about consumer buying decisions from BE.
C.
A branch of economics concerned with studying the impact of psychological factors on economic decision-making and various studies on behavioral economics are used to learn how consumers make buying decision.
Meaning is changed - we use BE to learn how consumers make buying decisions, but not a branch of economics and BE to learn how consumers make buying decisions
D. How consumers make buying decisions is learned from various studies on behavioral economics, a branch of economics concerned with studying the impact of psychological factors on economic decision-making.
D - Correct
E.
Various studies on behavioral economics, a branch of economics concerned with studying the impact of psychological factors on economic decision-making, learning how consumers make buying decisions.E - Verb is missing.