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Choice B is the best answer. The convention being tested is subject-modifier placement. This choice makes the noun phrase “amorphous ice” the subject of the sentence and places it immediately after the modifying phrase “defined… structure.” In doing so, this choice clearly establishes that amorphous ice—and not another noun in the sentence—is being described as having a disorganized molecular structure. 29 SAT PRACTICE TEST #11 ANSWER EXPLANATIONS SAT ANSWER EXPLANATIONS n READING AND WRITING: MODULE 2 Choice A is incorrect because it results in a dangling modifier. The placement of the noun “ice Ih” immediately after the modifying phrase illogically suggests that ice Ih has a disorganized molecular structure, whereas ice Ih is previously described as having molecules that form a hexagonal pattern. Choice C is incorrect because it results in a dangling modifier. The placement of the noun phrase “the lack of thermal energy” immediately after the modifying phrase illogically suggests that the lack of thermal energy has a disorganized molecular structure. Choice D is incorrect because it results in a dangling modifier. The placement of “ice Ih” immediately after the modifying phrase illogically suggests that ice Ih has a disorganized molecular structure, whereas ice Ih is previously described as having molecules that form a hexagonal pattern.