I have to say B. The rest were concepts made in Greece, by Greek philosophers, politicians, or mathematicians. An example for an advancement in math is the Pythagorean Theorem. I hope this helps!
Answer:
the answers are B- salt was used as a form of currency and D- salt was used to preserve food.
Explanation:
if a african american and a european were to have offspring their children would be biracial such as drake (the rapper) and the ex president barack obama.
