The white car is _________ more expensive than the green
(Options: very, pretty, fairly, slightly).
The answer given is slightly. Could you explain why this option is given as the correct one and others are not?
More expensive is an adjective. And I think very, pretty, fairly and slightly are adverbs. So to describe this adjective, can we also use the adverbs very and pretty, instead of slightly?
As I entered this in a grammar correction tool it indicated I should use much as a quantifier after pretty. i.e.
The white car is pretty much more expensive...
Is this is correct?