COULD U ANSWER THIS ???

Which is an example of a closed loop that best models a circuit?
A. a crowd dispersing in all directions
B. lightning striking a tree
C. students jogging around an oval track
D. a cross-country run from one point to another

B.lightning striking a tree

Explanation:

The crowd dispersing in all directions is not a closed-loop by any means, and students jogging around an oval track as well is not a closed-loop, and also not a cross country run from one point to another. However, the lightning striking a tree is a closed loop that best models a circuit. And as lightning strikes the tree, like a closed circuit, tree catches the fire, or in circuitry words, the current is generated, and tree catches the fire due to it, just like bulb starts glowing.

system programmer option d is correct

because an operating system is software that manages computer hardware and system resources.