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Verbal·Craft and Structure·Words in Context
medium
For most of its length, the Pungue River has sufficiently high flow velocity to suspend sedimentary particles; but when the river reaches the calmer waters of the Indian Ocean, its channel widens and divides, reducing flow velocity and thereby        sedimentary particle suspension. Particles are thus deposited, eventually forming deltaic lobes.
Which choice completes the text with the most logical and precise word or phrase?
A
compounding
B
obscuring
C
interrupting
D
expediting