A loop of wire is oriented in the magnetic field as shown (the plane of the loop is perpendicular to the direction of the magnetic field and the magnetic field strength increases with height). Which of the following is true? 
A. There will be an induced current only if the loop is moved to the right
B. There will be an induced current only if the loop is moved to the left
C. There will be an induced current only if the loop is moved upward
D. There will be an induced current if the loop is moved either up or down
E. There will be an induced current only if the loop is moved downward
Answer: D
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