Which command entered on a switch configured with Rapid PVST+ listens and learns for a specific time period?

Which command entered on a switch configured with Rapid PVST+ listens and learns for a specific time period?

A. switch(config)#spanning-tree vlan 1 priority 4096 B. switch(config)#spanning-tree vlan 1 hello-time 10 C. switch(config)#spanning-tree vlan 1 max-age 6 D. switch(config)#spanning-tree vlan 1 forward-time 20