Your Company has multiple subscriptions and wants to implement a custom Dashboard which would display the Secure Score for each subscription. 
Which of the following is a valid option?

Answer options:

A.Not possible to implement Secure Score on to a custom Dashboard
B.Can be implemented for only single subscription
C.Can be implemented using Secure Score REST API
D.Not possible, Secure score is only accessible through the Azure Portal

Answer: C 
Option A is incorrect because Secure Score can be accessed using REST API 
Option B is incorrect because using REST API, Secure Score can be retrieved for multiple subscriptions 
Option C is CORRECT, please see the reference url, accessing your secure score section 
Option D is incorrect because Secure score can be accessed through REST API 
Reference:

https://docs.microsoft.com/en-us/azure/security-center/secure-score-security-controls
https://docs.microsoft.com/en-us/graph/api/securescore-get?view=graph-rest-1.0&tabs=http