Choice B is very tempting. The key strike against it is a parallelism problem . It is unclear whether its network is parallel to the patience of its customers as an object of the preposition With (the intended meaning) ... OR is parallel to its customers as another object of the preposition of . The...

Let's examine the stem before diving into statements. √ x must always be positive because by convention the square root is always the positive square root. We also know that x must be positive; otherwise its square root would be imaginary. So the left side is always positive, because we are adding...

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The argument's conclusion is that it will be ... expensive ... to use the chemical in commercial applications . The premises are that the volume of ... chemical stored in ... glands is very small ; also that commercial applications ... require much greater amounts . To evaluate the argument, as per ...

Choice A has a misplaced modifier, because which must grammatically modify Europe . The logic of the sentence is that the actions described in the first clause, not Europe itself, are part of an effort . The possessive adjective their is plural, so it doesn't agree with its noun, insurance behemoth ...

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There is a LOT going on in this sentence. As is often the case, each of the incorrect answer choices has more than one error to disqualify it. But it's wisest to find one reason for each and move on. Choice A: The first thing that strikes me about this answer choice are the words introducing the und...