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Critical Reading>Sentence Completions
Choose the word or set of words that, when inserted in the sentence, best fits the meaning of the sentence as a whole.
While a "rock" is usually defined as ------- , or a combination, of one or more minerals, geologists often ------- the definition to include such materials as clay, loose sand, and certain limestones.
(A) a conglomeration . . limit
(B) an aggregate . . extend
(C) an element . . eliminate
(D) a blend . . restrict
(E) a product . . provide
