The right option is; b. the water caused an increase in temperature of the air inside the ball and an increase in pressure.
The dent (hollow area formed by pressing or hitting) from the ping-pong ball disappeared because energy was transferred from the hot boiling water in which the ball was placed to the air inside the ball. This transferred energy will increase the temperature of the air inside the ball and the air molecules will begin to move faster with a greater force. Hence, causing an increase in pressure.
The condition involving strokes and heart attacks caused by clots in unbroken vessels is called thrombosis and the pieces may break loose of the vessel wall and travel in the bloodstream as an embolus
I hope this helps!
I think it’s B? but i’m not sure.
The best option would be 'C'.