The Academic Computing Center has five trainers available in its computer labs to provide training sessions to students. Assume that the design capacity of the system is 1900 students per semester and that effective capacity equals 90% of design capacity. If the number of students who actually got their orientation session is 1500, what is the efficiency of the system?
A) 1350 students
B) 1710 students
C) 78.9%
D)87.7%
E) 90%
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