If the government wants to decrease the quantity consumed of cigarettes 20%,what percentage of tax would they have to levy on cigarette consumption?​

A) ​20%
B) 30%
C) 40%
D) ​50%

As a young man,my great-uncle ate 13 banana splits on a Saturday afternoon and never ate another one for the rest of his life.Most likely the utility of his last banana split was

A) positive.
B) zero.
C) negative.
D) greater than the utility of his 12th banana split.