208. Teratomas are unusual forms of cancer because they are composed of tissues such as tooth and bone not normally found in the organ in which the tumor appears.
(A) because they are composed of tissues such as tooth and bone
(B) because they are composed of tissues like tooth and bone that are
(C) because they are composed of tissues, like tooth and bone, tissues
(D) in that their composition, tissues such as tooth and bone, is
(E) in that they are composed of tissues such as tooth and bone, tissues
Only E, the best choice, clearly states that teratomas consist of tissues such as tooth and bone, and that such tissues are not normally found in the organ with the teratoma. Clear statement of this fact requires the repetition of tissues to establish the appositive--tissues normally found.... Without such repetition, A and B imprecisely state that the tooth and bone, as opposed to the tissues, are not normally found in the affected organ. Choices B and C alter the meaning with the use of like', that is, they suggest that the tissues are not tooth and bone, but only like them. The confused syntax of D states that their composition, not the tissues, is found in the organ....
