If you press the key corresponding to letter A on the keyboard, what process is carried out inside the CPU to display the letter on the screen?

a$.$ The keyboard transfers the letter $\text{'}$A$\text{'}$ directly to the monitor, without passing through the CPU.

b$.$ The CPU stores the keystroke as the letter $\text{'}A\text{'}$ and displays it on the screen.

$\text{'}$C$.\text{'}$A$\text{'}$ is converted to binary code, which the CPU processes. The computer then converts the code back $\text{'}A\text{'}$ for display.

d$.\text{'}A\text{'}$ is converted to special characters, which the screen translates back to $\text{'}A\text{'}$ for display.