Which of the Following Statements Correctly Describe SN₂ and SN₁

Which of the following statements correctly describe SN₂ and SN₁ reactions?
I. SN₂ reactions proceed with retention of configuration.
II. SN₁ reactions prefer polar protic solvents
III. SN₁ reactions produce racemic products
IV. SN₂ reactions are promoted in the presence of a substrate that produces a very stable carbocation
V.SN₁ reactions have a unimolecular rate-determining step.

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