Answer:
A bcs it's the most logical of all 4
Answer:to establish biological factors
Explanation:Biological factors are useful and crucial in explaning variations that exist between groups who may share the similar environment which may give an explanation of why some individuals are thin while others are obese Biological factors refers to things like genetic influence ,hormone levels , nutrition and gender.
The correct answer choices should be A.) The maniple was a flexible military unit and C.) The Roman soldiers built roads and bridges. Hope this helped!