The speed of light is the same for all observers, and the laws of physics are the same for all observers in uniform motion. These two statements are fundamental postulates of

A) general relativity
B) Newtons laws of motion
C) special relativity
D) the laws of electricity and magnetism

The two statements mentioned, "The speed of light is the same for all observers" and "The laws of physics are the same for all observers in uniform motion," are fundamental postulates of special relativity.

To arrive at this answer, we can go through each option and eliminate based on the given information:

A) General relativity is a theory formulated by Albert Einstein that describes the force of gravity and the curvature of spacetime. While special relativity is a part of general relativity, it specifically addresses the behavior of objects moving in the absence of gravitational forces. Thus, it is not the correct answer.

B) Newton's laws of motion were formulated by Sir Isaac Newton and describe the behavior of objects under the influence of forces. These laws do not explicitly address the constancy of the speed of light or the behavior of observers in uniform motion. Therefore, it is not the correct answer.

C) Special relativity, as stated above, is the correct answer. It was developed by Albert Einstein and explains the behavior of objects moving at significant fractions of the speed of light. The postulates mentioned align with the principles of special relativity.

D) The laws of electricity and magnetism, often referred to as electromagnetism, were formulated by James Clerk Maxwell. While the theories of electromagnetism are important in understanding various aspects of physics, they do not directly address the constancy of the speed of light or the behavior of observers in uniform motion. Thus, it is not the correct answer.

Therefore, the correct answer is C) special relativity.