Ethyl methyl ether $\underset{∆}{\overset{\mathrm{Conc}. \mathrm{HI}}{\to }}$Products. Correct statements about the reaction are 

A) It follows ${\mathrm{SN}}^1$mechanism

B) ${\mathrm{CH}}_3\mathrm{I}$ is formed

C) ${\mathrm{I}}^{-}$ is the nucleophile

• A

  B, C only

• B

  A, B, C

• C

  A, C only 

• D

  C only