You go to the bank to trade a dirty dollar for a new, clean one. the cashier tells you the trade is not necessary because currency is

In terms of the "great wheel of science", statistics are central to the research process (a) only between the hypothesis phase and the observation phase (b) only between the observation phase and the empirical generalization phase (c) only between the theory phase and the hypothesis phase (d) only between the empirical generalization phase and the theory phase