Write the next sentence in the following story.

How to protect cedar shingles
Regularly clear debris off of the shingles.
Organic matter like branches and leaves that lie on cedar for a long time can grow mold and mildew, which will in turn seep in the cedar and cause its quality to deteriorate. Clear the shingles approximately every 2 weeks, and remember to remove any debris after rainstorms.

Pick from: (A). Clear ice and snow off of the shingles. Keep inside areas behind the shingles properly insulated.; (B). Sweep up and remove the pine shingles every three weeks. Pine shingles are very porous, and require constant brushing and sweeping to avoid taking root or spreading seeds.; (C). Use pyrex and pvc sawdust to protect areas of the boards and flooring. Pvc is readily available at most hardware stores, and it helps to de-mold larger slab of wood.; (D). Drip-mark your cedar shingles. Rainstorms give the shingles plenty of oxygen to properly rejuvenate their outer structure, making them mint green and free of mold and mildew.;. The answer should be
(A).