A – Correct
In the second paragraph, it is mentioned that the ratio of omega 6: omega 3 in hunter-gatherer diets was 1:2. Their diets are more appropriate than the modern ones.
B – Wrong
The text only mentions the diets of hunter-gatherer. It does not mention anything about variability in hunter-gatherer diets around the world.
C – Wrong
The third paragraph clearly mentions that the fall in heart disease was related to consumption of polyunsaturated fats.
D – Wrong
The text contradicts this statement. In the third paragraph, it says that polyunsaturated fats have cardio protective nature.
E – Wrong
A higher ratio increases the cardio protective effect.