A consumer protection agency wants to compare the work of two electrical contractors to evaluate their safety records the agency plans to inspect residence in which each of these has done the wiring to estimate the difference in the proportion of residence that are electrically deficient. suppose the proportion of deficient work are expected to be about .6 for both contractors how many homes should be inspected to estimate the difference in proportion to using 95% confidence interval of width .8?

A) n1 = n2 = 29
B) n1 = n2 = 6
C) n1 = n2 = 12
D) n1 = n2 = 24