A Junior Linux Administrator Needs to Create 16 Empty Files

Multiple Choice

A junior Linux administrator needs to create 16 empty files quickly that will contain sales information for each quarter for the past four years. Which of the following commands will meet this requirement?

A) touch {2015,2016,2017,2018}.{q1,q2,q3,q4}
B) touch [2015,2016,2017,2018].[q1,q2,q3,q4]
C) touch '2015,2016,2017,2018'.'q1,q2,q3,q4'
D) touch {2015.2016.2017.2018}.{q1.q2.q3.q4}