|Question 13Verbal

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Text
Minerals can be classified by their ability to transmit light. Krotite, which transmits all or almost all light, is classified as        other minerals, such as groutite, are classified as opaque because they transmit no light.
Which choice completes the text so that it conforms to the conventions of Standard English?
transparent for example,
A
transparent; for example,
B
transparent, for example,
C
transparent, for example:
D