What should the Scrum Master suggest?

At the System Demo, each team demonstrates their own work, but the system is not integrated. They say they underestimated the integration effort and cannot integrate every Iteration and also meet the planned scope.

What should the Scrum Master suggest?
A . Discuss removing scope with Product Management to allow for Continuous Integration
B. Defer integration until the train is in the accelerate step of the Implementation Roadmap
C. Stop the train and go back to waterfall until integrations can occur
D. Integrate the system during the IP Iteration

Answer: A

Explanation:

Scrum Master need to ensure that itegration should happen for the system demo at every Iteration end to gather the feedback from stakeholders, SM need to discuss removing scope with Product Management to allow for Continuous Integration