Answer is….drumroll please A
So when one scientist turns around and says the mass of an electron is 9.10938291×10^-31 kilograms we know what a kilogram is and so we don't get an answer that it's 32949 microsmiths as he invented his own measurement because he needed one.
The third answer is not one of Newton's laws.
The second statement is Newton's first law (the law of inertia).
The last statement is Newton's second law.
The first statement is Newton's third law.
