A Difference Between Type II Restriction Enzyme and Type I

A difference between type II restriction enzyme and type I or type III restriction enzymes is that

A) type II enzymes require shorter recognition sequences.
B) type II enzymes cut at the recognition sequence rather than elsewhere.
C) type I and III cut palindromic sequences but type II does not.
D) type I and III require different proteins for methylation and cutting.
E) type II enzymes are found only in Gram-positive bacteria.