Like Terms, continued

Is it better to say the abbreviations are used "in manuscripts" (Choices (1) and (4)), "on manuscripts" (Choice (2)), "as part of manuscripts" (Choice (3)), or that they are "in use in manuscripts" (Choice (5))? "In manuscripts", the first option, is most direct, so eliminate Choices (2), (3), and (5).

Finally, is it more correct to say that something is "similar to" something else, or that it's "similar with" something else? "Similar to" is the correct idiom, so eliminate Choice (4).