But D occurs in the application level, it even says it in Samuel Davis' book.In multiple choice you are looking for the most correct option. So 2 options can be correct, but 1 is usually deemed as most correct by the markers.
D is the most technically correct/specific.
iirc it happens at the CCA level.But D occurs in the application level, it even says it in Samuel Davis' book.
"OSI Presentation Layer – The data is reorganised into a form suitable for subsequent transmission."