It’s most likely C: American Pioneers in the 1700’s
A.) If you have a bias towards something, you have shown a favor for one particular side. This occurs frequently in news and critical writing. I hope this helps. Also, being unbiased is having no particular favor of a side and you are usually understanding of both sides.
Answer:
He was late for work because his alarm clock was broken .
Explanation:
The second one is a run- on sentence. Without the because, there should be a period between the first and second half. The third one has an unnecessary comma.