Tom wants to buy a hand-held electric drill for woodworking. he wants a light drill that is easy to handle. he also wants a high power drill to be able to easily drill into hardwoods. tom would also like the drill to be cordless, so that he can use it outdoors when necessary.

Which statement explains why there is NO perfect solution for Tom's need?

A)Tom cannot choose the values of the variables.  

B)Only two of the three variables are measurable.  

C)Tom does not know which variables are important.  

D)The choice of one variable affects the choice of the others.

Whats the answer

Explanation:

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .