Many students are surprised to find that objects viewed through a pseudoscope, an optical instrument that reverses depth perception, appears inside out; a box, an example, would seem to be a square-shaped hole in the floor.

A) appears inside out; a box, an example
B) appears inside out, for example; a box
C) appears inside out; a box, for example
D) appear inside out, for example; a box
E) appear inside out; a box, for example

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Solution

E gives the correct pause. D uses a semicolon after for example which is not correct. All the remaining have basic errors, hence they can be easily eliminated.

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