Sunbathing is a popular activity. It can cause some skin-related problems. A. Not only is sunbathing a popular activity but it can also cause some skin-related problems. B. Popular though sun

Not only is sunbathing a popular activity but it can also cause some skin-related problems.

Popular though sunbathing is, it can cause some skin-related problems.

Popular as sunbathing is, this activity can't cause some skin-related problems.

How popular sunbathing is, it can't cause some skin-related problems.