The  sequence that ranks the coffee from the sweetest coffee to the least-sweet coffee is i, ii, iv, iii.
A sweet coffee will have less sugar added to it. Thus as we are trying to rank the sugars, we have to look at which sugars have more amount of sugar added as that will lead to the sweetest coffee.
Hence, the  sequence that ranks the coffee from the sweetest coffee to the least-sweet coffee is i, ii, iv, iii.
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