Which of the following BEST explains how a linear accelerator speeds up charged particles:

W) creating large electric fields that push particles along on electromagnetic waves

X) using magnets to push them along their trajectories

Y) using superconducting magnets to accelerate particles to near light speed

Z) using synchrotron radiation to ionize particles which are then accelerated by superconducting magnets
W) CREATING LARGE ELECTRIC FIELDS THAT PUSH PARTICLES ALONG ON ELECTROMAGNETIC WAVES