The correct answers are B) It shows us what it means to be human and D) It makes us better thinkers.
Historians agree that reasons for studying history are "It shows us what it means to be human and D) It makes us better thinkers."
To study history means to understand what has happened in the past in order to understand the present. It is learning about the evolution of human beings. Knowing what human did right to repeat it and what went wrong to learn from the past and avoid those things in the future.