Which Is NOT One of the Differences Between a Cyclotron

Multiple Choice

Which is NOT one of the differences between a cyclotron and a synchrotron?

A) Orbits in a cyclotron are spirals, while in a synchrotron they are circles
B) Conventional cyclotrons fail above energies of about 50 MeV because the proton speeds get too close to the speed of light, while synchrotrons are designed to accommodate all proton energies
C) Large cyclotrons would require extremely large magnets, since they must cover all possible orbital radii, while synchrotrons only need a thin ring
D) In general, synchrotrons are much smaller than cyclotrons
E) Both cyclotrons and synchrotrons require electrical oscillators to accelerate the protons