Two electrons are moving up when they enter a magnetic field that points down. what happens to the motion of the particles?

There will not be any effect due to external magnetic field apart from repulsion between electrons due to its charges electromagnetic attraction (or attraction between parallel current will be there between them will come) Due to this there will be motion perpendicular to the applied magnetic field also. Motions may be quite complicated may be repelling helix or attracting helix depending upon the velocity of electrons.

Well the magnitude of its acceleration related to that car starts with the oil change like when you have to change the oil in your car you have to make sure that your precious car is starting really propley and very well

The best answer is (a) which is universal law is in effect at all times. it is constantly at play in everything we do and governs our lives. it is also important to note that universal law applies to not only everything on earth, but everything in the universe as well, which is another reason why it is in effect at all times.