Lionel is buying ice chests to hold 144 bottles of lemonade for a picnic. Each ice chests holds 20 bottles. Lionel calculates that he needs to buy 8 ice chests.
Which is the best explanation for whether or not his answer is reasonable?

Lionel's answer is reasonable; 144 ÷ 20 = 7.4, so 8 ice chests are needed.

Lionel's answer is not reasonable; 144 ÷ 20 = 7.2, so 7 ice chests are needed.

Lionel's answer is reasonable; 144 ÷ 20 = 8.2, so 9 ice chests are needed.

Lionel's answer is reasonable; 144 ÷ 20 = 7.2, so 8 ice chests are needed.