Question

if you want to get a good night's sleep . you_______any coffee in the evening since it gives insomia.

a.were able to drink

b.mustn't drink

c.don't have to drink

d.would rather drink

Answer 1

Answer :it should be option B  (Must not drink)

Answer 2

if you want to get a good night's sleep. you mustn't drink any coffee in the evening since it gives insomnia.

I think the most appropriate option should be 'b'. correct me if I wrong.