Your College Campus Is Broken into Five Sections (Main Campus

Multiple Choice

Your college campus is broken into five sections (Main Campus, North Campus, East Campus, West Campus, and South Campus) . The board of trustees has recently approved the installation of 70 emergency blue lights. The lights will be apportioned based the area of each section (i.e. the larger the section, the more lights) . The table below gives the area, in acres, of each section of campus.
What is the standard divisor for this apportionment problem?

A) 20
B) 30
C) 40
D) 50
E) None of the above.