1.It's A because 'as' should have been used, meaning 'which'. 'I will refuse his demands which are outrageous '.
2.But' unless' has nothing to do with the context provided in C because 'until' should have fitted here.
Is there a paragraph you have to read?
Do you still need help with this??
wet - wetter - wettest
beautiful - more beautiful - most beautiful
dry - drier - driest
friendly - friendlier - more friendly
low - lower - lowest
cold - colder - coldest
popular - more popular - most popular
difficult - more difficult - most difficult
nice - nicer - nicest
mild - milder - mildest
