A timer has been configured with a period of $10000$ counts, and a compare register value of $2500$ counts. The corresponding waveform output is connected to an LED. Which of these statements is correct?

Group of answer choices

$($a$)$ The brightness of the LED will be approximately $25\%$ of what it would be if constantly on$.$

$($b$)$ The brightness of the LED will be approximately $50\%$ of what it would be if constantly on$.$

$($c$)$ The brightness of the LED will be approximately $75\%$ of what it would be if constantly on$.$

None of the above.

One of $($a$)$ or $($c$)$ above.