If one were to choose an SRS from a population, one could be sure that the _____, computed from the SRS, is a(n) _____ estimate of the population's true _____. One also knows that one can reduce the _____ of the result as desired, by taking a large enough sample.

a.parameter; unbiased; statistic; variationb.statistic; unbiased; parameter; variationc.statistic; variation; parameter; unbiasednessd.parameter; variation; statistic; unbiasedness