You multiply all of them together and you get 12.
<span>All such civilizations gravitate towards "Empire" building. Each Empire fights other Empires.</span>
Answer: B
Explanation: "Amendments may be proposed either by the <em>Congress</em>, through a joint resolution passed by a two-thirds vote, or by a convention called by Congress in response to applications from two-thirds of the state legislatures." -senate.gov
Trade can connect an empire because trade is a very basic aspect of advancement in a civilization/empire
Bull Connor.
I had this question on USA Test Prep. Just writing Bull works too.