Word order in a positive sentence

[A. Homer]

English Grammar Tests, Elementary Level

ESL/EFL Test #50 "Elementary Grammar Questions", question 9

......... drive me home later?

(a) Do you think you can
(b) You can
(c) Did
(d) Is possible

English Grammar Tests, Elementary Level

ESL/EFL Test #50 "Elementary Grammar Questions", answer 9

Do you think you can drive me home later?

Correct answer: (a) Do you think you can
_________________________

Is b right?

A. Homer

[Conchita]

No, it isn't. The word order in answer (b) would be right for a positive sentence: 'You can drive me home later'. The question would have to be: 'Can you drive me home later?'.

The right option is (a).