State $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ laws allow consumers to cancel contracts signed with door$-$to$-$door salespeople within a limited number of days after agreeing to such contracts.

Select one:

a$.$

Reciprocal dealing

b$.$

Cooling off

c$.$

Tying agreement

d$.$

Truth$-$in$-$lending

e$.$

Packaging and labeling