OFFICIAL EXPLANATIONThis sentence describes a contrast between appearance and reality: the javelin seems more dangerous than the discus, because of its physical appearance, but the discus is actually more likely to injure bystanders. The sentence must express this contrast with an appropriate transition. Additionally, the adverb obviously must be placed with care: if obviously is placed in front of more dangerous, then the resulting sentence contradicts itself. The intended meaning is not that the javelin is actually more dangerous, but, rather, that the danger posed by the javelin is more obvious than that posed by the discus; therefore, obviously should be placed directly in front of dangerous.
(A) The relative pronoun which refers to a sharp point, thus setting up a comparison between a sharp point and the discus. This comparison is nonparallel; the sentence should compare the discus with the javelin itself, not with the javelin's point. The connector moreover, while acceptable from the standpoint of pure grammar, is illogical, since the following observation does not reinforce the preceding one.
(B) This sentence is self-contradictory: it begins by stating that the javelin is "obviously more dangerous" than the discus, but then describes the discus as more dangerous. Additionally, the connector and illogically suggests that the obviousness of the danger posed by the javelin is independent of its having a sharp point.
(C) This version sets up a comparison between the javelin's sharp point and the discus. This comparison is nonparallel; the sentence should compare the discus with the javelin itself, not with the javelin's point. Also, this sentence is self-contradictory: it begins by stating that the javelin is "obviously more dangerous" than the discus, but then describes the discus as more dangerous.
(D) This sentence is self-contradictory: it begins by stating that the javelin is "obviously more dangerous" than the discus, but then describes the discus as more dangerous. This version also sets up a comparison between the javelin's sharp point and the discus. This comparison is nonparallel; the sentence should compare the discus with the javelin itself, not with the javelin's point.
(E) CORRECT. This choice places obviously in front of dangerous, correctly conveying the intended idea that the danger posed by the javelin is more obvious than that posed by the discus. The modifier with its sharp point is correctly used to explain why the javelin is so obviously dangerous. Finally, the second clause is introduced by however, a transition that correctly indicates the contrast between the two clauses.
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"It Always Seems Impossible Until It Is Done"