What is the problem with the following survey response set?

What is your annual income?

a$.$ under $$10,000$

b$.$ $$10,000-$$$35,000$

c$.$ $$35,500-$$$50,000$

d$.$ $$50,001-$$$250,000$

e$.$ above $$250,000$

The response set is not valid

The response set is not exhaustive

The response set is not mutually exclusive

The response set its not mutually exhaustive