Speed has the dimensions of distance divided by time. The SI unit of speed is themetre<span> per second, but the most common unit of speed in everyday usage is the kilometre per </span>hour<span> or, in the US and the UK, miles per </span>hour<span>. For air and marine travel the knot is commonly used.</span>
Label A: sublimation
Label B: condensation
Label C: melting
Is there a multiple choice?
The answer is option A, i think but i am not sure
