A technician is troubleshooting a Windows computer experiencing a slow startup.

What is the next step$($s$)$ the technician should take to determine whether or not the startup processes are responsible for the slow startup?

a$.$

The technician should disable all scheduled tasks in Task Scheduler and reboot the system.

b$.$

The technician should measure the time it takes to start the system using a normal boot and compare that time against the time it takes for the system to perform a clean boot.

c$.$

The technician should permanently disable all startup processes in System Configuration.

d$.$

The technician should back up user data and reinstall Windows and all applications.