Mold and mildew can cause health problems. We need to remove any growth regularly.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions

Question:

Mold and mildew can cause health problems. We need to remove any growth regularly.

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  A.
  We need to remove any growth of mold and mildew regularly so that they can cause health problems.
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  B.
  Mold and mildew can cause health problems because we need to remove any growth regularly.
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  C.
  Mold and mildew can cause health problems, so we need to remove any growth regularly.
• 
  D.
  Mold and mildew can cause health problems when we remove any growth regularly.