A Positively Charged Particle Has a Velocity in the Negative

Multiple Choice

A positively charged particle has a velocity in the negative z direction at point P. The magnetic force on the particle at this point is in the negative y direction. Which one of the following statements about the magnetic field at point P can be determined from this data?

A) B_x is positive.
B) B_z is positive.
C) B_y is negative.
D) B_y is positive.
E) B_x is negative.