What Does Current Research Suggest About How the Macronutrient Composition

What does current research suggest about how the macronutrient composition of your daily diet may affect weight gain?

A) Excess carbohydrate consumption is most likely to cause weight gain.
B) Excess protein consumption is most likely to cause weight gain.
C) Excess fat consumption is most likely to cause weight gain.
D) People gain weight no matter which macronutrient they consume the most of.