The researcher in charge of a research study is called what?

The transformation that took place starting in the 18th century that introduced the machinery of the modern age is better known as ______.

a. technological revolution b. information revolution c. digital revolution d. industrial revolution

The price of soda in different states may vary due to ______.

a. variations in the tax rate b. the value of the dollar c. the fact that some people really like soda d. the Great Recession