Which statement best explains why historians use a variety of sources when exploring past events? A. They want to discover how historical figures reacted to events.
B. They must use sources that were created in the time period they are studying.
C. They must study and approve of the viewpoints of historical figures.
D. They need to learn about and confirm the truth of details about the past.

D is the correct answer.

The first two are wrong because the historian's job is to find out what happened and why and how etc not to find out what some old rulers face looked like when they saw that the won the war. You can study with primary or secondary sources as long as the are credible and reliable.

They don't need to approve of some dead guys viewpoint.

D is the answer.

Explanation:

Trust me I have lots of education!

I hope you find this helpful. Please leave a review of 5 if helpful or give a thanks or mark as brainliest(if you can.)

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation: