In a survey of sleeping habits, 8400 adults were selected randomly and contacted by telephone. Based on a medical association’s recommended amount of sleep for adults, respondents were asked, "Do you typically sleep more than six hours during the night?" Of those surveyed, only 46% reported that they did.
Which of these statements is true with respect to this scenario?

a) 46% is a statistic and represents an estimate of the unknown value of a parameter of interest.
b) 46% is a parameter and represents an estimate of the unknown value of a statistic of interest.
c) 8400 is the size of the population being studied.
d) None of the answer options are correct.