Hillview Elementary School has 2 sixth-grade classes of 27 students each. On a Friday, the entire 6th grade went on a field trip to the science museum. Some of the 6th graders were absent that day. If s represents the number of students who were absent on that Friday, which of the following expressions shows how many 6th graders went to the science museum?
A.
(27 - 2) ÷ s
B.
(27 × 2) - s
C.
(27 ÷ 2) - s
D.
(27 - 2) × s