Heterogeneous Catalysts Are Used in Industrial Processes Because

Heterogeneous catalysts are used in industrial processes because
I. they utilize more of the catalyst atoms.
II. it is easier to separate the products from the catalyst.
III. higher operating temperatures are readily obtained.
IV. they are more selective.Which of the above statements are true?

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