I think that the answer could be A. X and Y
It’s jingju because it was established in 1955
Independent variable is the thing that you change in the experiment (ex:temperature) and the dependent variable is the thing that you measure depending on the thing you change (ex:volume of oxygen produced)
The answer is C. Strong nuclear force. Subatomic particles in the core of an atom (protons and neutrons) are held together by this type of force. The force is known to be one of the 4 fundamental forces of our universe.
1the carrier would be 3 as to the the yes and the no differ from 2 which would mean they are the same, but if you take three , you have more equal signal, giving it a better digital quality
2incorect, primary, and clocks-worth both as well also use binary ode, because they all have a timmid connetion between gavity waves