Which of the Following Is Not a True Statement

Multiple Choice

Which of the following is not a true statement?

A) During the Permian time when Pangea formed, ocean currents were able to effectively mix
B) Computer models indicate that the assemblage of all continents into a supercontinent created a single global ocean
C) If the Earth has a single global ocean, this can prevent the mixing of surface water and the ocean depths which significantly impacts the chemistry of ocean water
D) If the Earth has a single global ocean, the ocean water can stagnate causing dissolved oxygen to be depleted
E) If the Earth has a single global ocean, the stagnated ocean water can produce dissolved hydrogen sulfide that can be lethal to ocean life