Planet X has a magnetic field with strength 0.80 G in the southern direction. When a probe is placed 30 mm east of a vertical wire it measures a field of 0.60 G in the southern direction. What would a probe read if placed 10 mm east of the vertical wire?

A. 0.20 G towards the south
B. 0.60 G towards the north
C. 1.00 G towards the south
D. 1.40 G towards the north