Find the velocity, acceleration, and speed of a particle with the position function r(t) = ⟨−12t^2, t⟩.
A. Velocity: ⟨−24t, 1⟩, Acceleration: ⟨−24, 0⟩, Speed: 12t
B. Velocity: ⟨−24t, 1⟩, Acceleration: ⟨−24t, 0⟩, Speed: 12t
C. Velocity: ⟨−24t, 1⟩, Acceleration: ⟨−24t, 1⟩, Speed: 12t
D. Velocity: ⟨−24t, 0⟩, Acceleration: ⟨−24, 1⟩, Speed: 12t