The answer is C because when the chemicals on the tip of a match are heated up from friction it ignites.
The speed of an object in a mass-spring system is given under the function

Here,
m = mass
k = Spring constant
A = Amplitude
x = Position
When the position is at the equilibrium point (x = 0), the speed will be maximum, and could even be expressed as

So the correct answer is B.
Her muscles were flaring with the blood coursing through her muscles.