At $t = 0$,a charge $q$ is at the origin and moving in the $y$-direction with velocity $\vec{v} = v\hat{j}$. The charge moves in a magnetic field that is for $y > 0$ out of the page and given by $B_1\hat{k}$ and for $y < 0$ into the page and given by $-B_2\hat{k}$. The charge's subsequent trajectory is shown in the sketch. From this information,we can deduce that:

• A
  $q > 0$ and $|B_1| < |B_2|$
• B
  $q < 0$ and $|B_1| < |B_2|$
• C
  $q > 0$ and $|B_1| > |B_2|$
• D
  $q < 0$ and $|B_1| > |B_2|$