[单选题]
A toy rocket, of mas4eiv5zq xd) q/kfy6,fs 0.12 kg, achieves a velocity of 40 m/s afa1xbzk dw:0ce be re*60d2r*b ter 3.0 s, when fired straight up. What average thrust force does the rocket engine e0zwbdbkxcad e*r 26rb e1 :*0exert?
A. $1.2 \; N$
B. $1.6 \; N$
C. $2.8 \; N$
D. $4.4 \; N$
