How can the hello timers on SW_B be adjusted from the default?

Refer to the exhibit. How can the hello timers on SW_B be adjusted from the default?

A.
altering the STP hello time to 1 second on switch SW_B

B.
altering the STP diameter to 3 on switch SW_A

C.
altering the STP diameter to 3 on switch SW_B

D.
altering the STP hello time to 1 second on switch SW_A