Answer:
Option A
Explanation:
At segment T-U, the substance changes from a liquid to a gas and does not change temperature.
The reason is because latent heat of vaporisation allows for the absorption of heat in the change of state and temperature remains constant until it has fully changed state.
<span>v is perpendicular to both E and B and has a magnitude E/B</span>
Your answer is C) The year the element was discovered :)