Boundaries: Punctuation and Sentence Structure

SAT Reading and Writing· difficulty 2/5

Octopuses can change color in less than a second ______ they can also alter the texture of their skin to match their surroundings.

Which choice completes the text so that it conforms to the conventions of Standard English?

  • A

    :

  • B

    and

  • C

    , and

    check_circle
  • D

    , and,

Explanation

Comma plus "and" joins two independent clauses. " and" produces a run-on without comma; ", and," is over-punctuated; ":" misuses the colon since the second clause is not an explanation.

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