A company is planning to subnet its network for a maximum of 27 hosts. Which subnet mask would provide the needed hosts and leave the fewest unused addresses in each subnet?

255.255.255.0
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248

ccna exploration 1 chapter 10 Exam Question And Answers 

A company is planning to subnet its network for a maximum of 27 hosts. Which subnet mask would provide the needed hosts and leave the fewest unused addresses in each subnet?