Which Is NOT True of Insulin

Which is NOT true of insulin?
I. Its receptors must dimerize for activation to occur
II. It recruits scaffolding proteins such as IRS which begins signal amplification
III. It influences cell growth by working through the MAP kinase pathway
IV. It activates lipases leading to release lipids from adipocytes

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