Which of the Following Statements Is (Are)correct About Restriction Enzymes

Multiple Choice

Which of the following statements is (are) correct about restriction enzymes?
I.They are used by bacteria to cut up foreign DNA.
II.They cut DNA unevenly to produce "sticky ends."
III.They are non-specific and cut anywhere along a sequence.
IV.They are involved with heterochromatin production.

A) I only
B) IV only
C) I and II
D) I, II, and III
E) III and IV