You have just finished configuring a GPO that modifies several settings on computers in the Operations OU and linked the GPO to the OU$.$ You check on a few computers in the Operations Department and find that the policies haven't been applied. On one computer, you run gpupdate, and the policies are applied correctly. What's a likely reason the policies weren't applied to all computers when you tried to update them remotely?

a$.$ The Computer Configuration node of the GPO is disabled.

b$.$ A security filter that blocks the computer accounts has been set.

c$.$ The Operations OU has Block Inheritance set.

d$.$ Computers only apply GPO settings every $90$ minutes or when the computer reboots.