How do scientists confirm their conclusions when they use the scientific method?

They assert a belief.

They repeat their work.

They gather data.

They state their problem

Scientists use observations and data to draw a conclusion. Observations lead to the recording of data. Scientists ask questions about their observations and then collect data to answer their questions, then they have their evidence.

These are my options

A. They gather data.

B. They assert a belief.

C. They repeat their work.

D. They state their problem.