Sentence Correction (SC) | Re: The onset of monsoons in the Indian Subcontinent is triggered by

The onset of monsoons in the Indian Subcontinent is triggered by a combination of lower level moist, maritime air flowing onshore from the south-east, a high pressure cell and the flowing southward of moist tropical air.

A. the flowing southward of moist tropical air
B. moist tropical air flowing southward
C. the southward flowing of moist tropical air
D. the southward flowing of moist tropical air
E. moist tropical air that flows southward