How long will it take for VM4 to begin powering on after the vApp is powered on?

A vApp Author deploys a multi-virtual machine vApp to My Cloud with the startup options defined
a follows:
How long will it take for VM4 to begin powering on after the vApp is powered on?

A.
10 seconds

B.
20 seconds

C.
30 seconds

D.
40 seconds