The answer is D.
A war in Mexico would fall under northern command. Northern commands was created by secretary of defense Rumsfeld in respond to war on terrorism and national security. It covers Canada, the United States of America, and Mexico.
There would be unlikely that Mexico would pick a war againts U.S.A though
Answer:
A manipulated variable is the independent variable in an experiment. It's called “manipulated” because it's the one you can change
The voice authors used when they seeming talk for themselves
