You have developed a non-critical update to your application that is running in a managed instance group, and have created a new instance template with the update that you want to release. To prevent any possible impact to the application, you don`t want to update any running instances. You want any new instances that are created by the managed instance group to contain the new update. What should you do? 

Answer options:

A. Start a new rolling restart operation.
B. Start a new rolling replace operation.
C. Start a new rolling update. Select the Proactive update mode.
D. Start a new rolling update. Select the Opportunistic update mode.

C