Consider a flow over a flat plate of uniform cross section area, the flow moves at a constant speed. Due to a certain disturbance, there is a disturbance in the flow. In the given scenario, which of the following statement is true?

• A. The flow remains uniform even after the disturbance
• B. The flow remains uniform throughout
• C. The flow is the first uniform and after disturbance undergoes non-uniformity
• D. The disturbance will change the cross section area