What Is the Effect of First Adding Oligomycin and Then

What is the effect of first adding oligomycin and then 2,4-dinitrophenol to respiring mitochondria?

A) First, electron transport and ATP synthesis speed up, then electron transport and ATP synthesis stops.
B) First, ATP synthesis and electron transport stop, then electron transport speeds up with no ATP synthesis.
C) First, electron transport speeds up while ATP synthesis stops, then electron transport and ATP synthesis stops.
D) First, electron transport stops while ATP synthesis continues, then electron transport and ATP synthesis stops.
E) Nothing, the uncoupler and inhibitor cancel each other out.