Karie read the following definition of the term scientific method:
"the series of steps that scientists use to answer questions and solve problems."

Do scientists always follow one fixed scientific method during real-life investigations?
A.
Yes, a fixed scientific method is always the most efficient way to test a hypothesis.

B.
No, scientists only follow a fixed scientific method if their investigation does not validate their hypothesis.

C.
No, most investigations cannot be performed using a fixed procedure of steps.

D.
Yes, an investigation is not valid unless it follows a fixed scientific method.