What is the correct application mapping sequence when a user goes to Facebook for the first time through an SRX Series device?

What is the correct application mapping sequence when a user goes to Facebook for the first time through an SRX Series device?
A . first packet > process packet > check application system cache > classify application > process packet > match and identify application
B . first packet > check application system cache > process packet > classify application > match and identify application
C . first packet > check application system cache > classify application > process packet > match and identify application
D . first packet > process packet > check application system cache > classify application > match and identify application

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Answer: D