There are many different types of viruses and bacteria that can live and reproduce inside humans and often make us sick. in which of the following ways are viruses different from bacteria?

a- viral infections always cause a fever while bacterial infections almost never do
b- viruses must invade a host cells to reproduce while bacteria can reproduce on their own
c- virus cells, in general, are at least three times as large as the largest bacterial cell
d- viral infections are more likely to disable or kill their host than bacterial infections