Which of the following alcohols will give a pure…

Which of the following alcohols will give a pure…

Which of the following alcohols will give a pure secondary alkyl halide on treatment with HBr?
A) CH3CH2OH 
B) (CH3)2CHCH(OH)CH(CH3)2 
C) (CH3)3COH 
D) (CH3)2CHOH 
E) none of these 

Additional Requirements 
Other Requirements: hurry please!!