Situation 19.2 The Objective and the Eyepiece of a Microscope Have Focal

Situation 19.2
The objective and the eyepiece of a microscope have focal lengths of 4.0 mm and 25 mm,respectively.The objective produces a real image 30 times the size of the object.The final image is viewed at infinity.The near point of the microscope user is at 25 cm.
-In Situation 19.2,the overall magnification of the microscope is closest to:

A) 250
B) 300
C) 350
D) 400
E) 450