Final answer:
The grammatically correct sentence is 'b. It's obvious that you drive faster than me.'
Step-by-step explanation:
The grammatically correct sentence is: b. It's obvious that you drive faster than me.
In this sentence, the word 'faster' is used correctly as a comparative adjective to compare the driving speed of the speaker and the person being addressed. Option a is incorrect because 'as faster as me' is not grammatically correct. Option c is also incorrect because 'more fast' should be 'faster'. Option d is incorrect because 'no faster than' is used to indicate that both parties are driving at the same speed, which contradicts the intended meaning of the sentence.