help with statistics

It Is always good to have as narrow a condence interval as possible, because a Cl. is an estimate of a parameter, and a narrower Cl. is a more precise estimate. In lecture we learned three factors that affect the width of a Cl. With all that in mind, which C.l. below has the combination that would make it the NARROWEST out of all four options? (Hint: compare the answer options to each other two at a time, and do a process of elimination). O A C.l. with n=55, 95% level of condence, $2 = 28.5 (large variance) 0 A C.l. with n=75, 99% level of condence, $2 = 28.5 (large variance) 0 A C.l. with n=75, 95% level of condence, $2 = 5.0 (small variance) 0 A C.l. with n=55, 99% level of condence, $2 = 5.0 (small variance)