$A$ particle is constrained to move on a straight line path. It returns to the starting point after $10\, s$. The total distance covered by the particle during this time is $30\, m$. Which of the following statements about the motion of the particle is false?
- ADisplacement of the particle is zero
- BAverage speed of the particle is $3\, m/s$
- CDisplacement of the particle is $30\, m$
- DBoth $(a)$ and $(b)$
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