Let W be a random variable giving the number of heads minus the number of tails in three tosses of a coin. List the elements of the sample space S for the three tosses of the coin and to each sample point assign a value w of W. Select the correct choice below and fill in the answer boxes to complete your choice. O A. . C. O D. S. S. W S. HH H. HHH HHH HT HHT HHT TH HTH HTH TT THH HTT HTT THT TTH TTT