Chondrites are stony meteorites that are undifferentiated—that is, their contents have not melted and separated into distinct layers. They are rarely many chondrites experience aqueous alteration as a result of exposure to fluids, as well as fracturing, veining, and localized melting due to collisions with other objects.
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Verbal·Standard English Conventions·Boundaries
hardWhich choice completes the text so that it conforms to the conventions of Standard English?
A
pristine, though;
B
pristine; though
C
pristine, though
D
pristine, though.