A \( \frac{\mathrm{dA}}{\mathrm{dt}} \) and \( \frac{\mathrm{dx}}{\mathrm{dt}} \)
B \( \frac{\mathrm{dx}}{\mathrm{dt}} \) and \( \frac{-\mathrm{dA}}{\mathrm{dt}} \)
C \( \frac{\mathrm{dA}}{\mathrm{dt}} \) and \( \frac{-\mathrm{dx}}{\mathrm{dt}} \)
D \( \frac{\mathrm{dt}}{\mathrm{dx}} \) and \( \frac{-\mathrm{dA}}{\mathrm{dt}} \)