$A$ rocket with a lift-off mass of $3.5 \times 10^4 \ kg$ is blasted upwards with an initial acceleration of $10 \ m/s^2$. The initial thrust of the blast is:
- A$1.75 \times 10^5 \ N$
- B$3.5 \times 10^5 \ N$
- C$7.0 \times 10^5 \ N$
- D$14.0 \times 10^5 \ N$
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