In a thrust reversing system, what is the purpose of cascade vanes?

In a thrust reversing system, what is the purpose of cascade vanes?

• A. Turn to a forward direction the fan and/or hot exhaust gases that have been blocked from exiting through the exhaust nozzle
• B. Form a solid blocking door in the jet exhaust path
• C. Turn the exhaust gases forward just after exiting the exhaust nozzle
• D. Open the exhaust path to reduce thrust

Answer: (A)