Hello, i have posted this question many times in chegg, but every time people answering this question to use ai tool like chatgpt, please dont use gpt and other ai tool. Provide me original answers with proper explanations. thank you. Question:- Hello experts, I have posted this question many times in chegg, but every time people answering this question to use ai tool like chatgpt, please dont use gpt and other ai tool. Question: The branch of economics concerned with overall performance of the economy is known as (A) Microeconomics (B) Macroeconomics (C) Econometrics (D) Keynesian Economics This question will be reviewed by Chegg.