1) First modern credit card introduced. 2) First organ transplant. 3) First "peanuts" cartoon strip introduced. 4) Korean war begins. 5) Senator Joseph Mccarthy begins communist witch hunt. 6) U.S president Truman orders construction of Hydrogen bomb. Hope this helps :)
Answer:
A. The separation of powers
Explanation:
The Spirit of the Laws was the book that described a version of Roman government that used the separation of government's power into independent branches as a main principle.
answer A the availability of raw materials
