Answer:
I'm pretty sure it's all of the above
Explanation:
A) Worship of the same gods. And B) Common language.
I won't go with C. because the Greek City-States actually didn't worship same gods. Every person has their choice to choose who they Worship.
Answer:
a family hunts for food in order to survive
A) the number symbols and the decimal system for recording numbers like 2376.6