what's a better deal based on effective rate of return for a deposit A$.$ they all have the same effective rate of return $4\mathrm{.}2\%$ B$4\mathrm{.}1\%$ CIS C$3\mathrm{.}9\%$ CIM D$.4\mathrm{.}2\%$ CIA E$.4\mathrm{.}0\%$ CIQ