Which choice displays appropriate use of parallel structure and correct use of commas?
A) To boat, to ski, and sunbathing are three activities in which a person can take part at the lake.
B) To boat, to ski, and to sunbathe, are three activities in which a person can take part at the lake.
C) To boat, skiing, and to sunbathe, are three activities in which a person can take part at the lake.
D) Boating, waterskiing, and sunbathing are three activities in which a person can take part at the lake.