You are running an online gaming application hosted on a VM.Standard2.1 instance shape in Oracle Cloud Infrastructure. As the game becomes popular, you identify network throughput as a bottleneck on your instance when uploading user data. Though you want to resolve the issue, you want to observe the demand for a week before adding new application instances. Which action is the most efficient way to resolve this issue? 

Answer options:

A. Add a secondary virtual network interface card (VNIC).
B. Change shape of the instance to a higher network bandwidth instance.
C. Delete the instance while preserving boot volume and spin up a new higher network bandwidth instance with this boot volume.
D. Change the performance tier of attached block volume to High Performance.

B