D states that the internet is a vector of climate change, that is, it contributes to the problem. C adds to this, stating that the world's data centers have the same carbon footprint as the aviation industry. DC is a unit. Both A and B are about how climate change affects the internet. This is the exact opposite of what C and D are about (how the internet brings about climate change). So where do AB and CD overlap? B talks only of how rising seas imperil the internet. A, on the other hand, talks of a 'vicious cycle' that information technologies set off. What could this be? A states that with a rise in temperature, information technologies work less efficiently. C and D state that the internet contributes to global warming. So, with a rise in temperature, information technologies consume more energy, which in turn causes a further rise in temperature. DCA is a unit. B is the odd one out. Correct Answer: Choice (B)
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