In the acid-catalyzed dehydration of alcohols to alkenes, which of the ... ...

In the acid-catalyzed dehydration of alcohols to alkenes, which of the following are true?   I) A carbanion intermediate is involved. II) A carbocation intermediate is involved. III) There is no intermediate involved. IV) Methyl shifts can occur in the interme-diates. V) Hydride shift can occur in the intermediates.  
(A) I, IV & V only
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 16. Alkenes