You are asked to set up application performance monitoring on Google Cloud projects A, B, and C as a single pane of glass. You want to monitor CPU, memory, and disk. What should you do? 

Answer options:

A. Enable API and then share charts from project A, B, and
C.B. Enable API and then give the metrics.reader role to projects A, B, and
C.C. Enable API and then use default dashboards to view all projects in sequence.
D. Enable API, create a workspace under project A, and then add projects B and
C.

C