Which of the Following Is a Reason That Theoretical Assumptions

Multiple Choice

Which of the following is a reason that theoretical assumptions are not subject to empirical testing?

A) Scientists' base their assumptions on their personal understanding of the world.
B) Assumptions are abstract and so cannot be tested in the physical world.
C) Many technologies that could be used to test the assumption are too expensive for practical use.
D) Scientists cannot reasonably know and understand reality.