The probability of tails of a weighted coin is 0.8. The number of tails is noted each of the 20 times the coin is tossed. If this procedure is repeated 75 times, what type of distribution is simulated?

a- A sampling distribution of the sample proportion with n = 20 and p = 0.8

b- A sampling distribution of the sample proportion with n = 75 and p = 0.8

c- A binomial distribution with n = 2 and p = 0.8

d- A binomial distribution with n = 20 and p = 0.8