A(n) is a way of thinking or a set of ideas about particular subjects.
a. philosophy
b. theorem
c. proof
d. axiom

I believe the answer is: A. philosophy

Philosophers would focus on studying general and fundamental problems in life, usually revolve around existence, knowledge, mind, value, reasons and language. Even though the subjects may vary, several well-known philosophers contributed to the development of applicable science.

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .