Which of these choices displays both proper parallel structure and correct use of commas?
a) my preferred forms of exercise include to run, to swim, biking, and rowing.
b) my preferred forms of exercise include running, swimming, biking, and rowing. c) my preferred forms of exercise, include running, swimming, biking, and rowing. d) my preferred forms of exercise include running, swimming, biking, and i also like to row.

B) My preferred forms of exercise include running, swimming, biking, and rowing.

Explanation:

Parallelism is the use of the same structure or rhythm in a parallel or similar form. This parallelism may be based on the grammar or sound or even meaning.

For the sentence to have a parallel structure, the use of the same or similar sounding words like running, swimming, biking and rowing all show a sense of c-ordination. They all have the same pattern of words, indicating the same level of importance in each word.

Thus, the correct answer with the proper parallel structure and correct use of the commas is option B.

i think its c

independent