27.As a genera rule, to achieve comparable returns, what should be the relationship of a taxable interest rate to a tax-exempt interest rate?

Select one:

a.the taxable interest rate needs to be higher than the tax-exempt interest rate

b.the taxable interest rate needs to be lower than the tax-exempt interest rate

c.the taxable interest rate needs to be the same as a tax-exempt interest rate

d.the taxable interest rate needs to be adjusted by the same percentage as the tax-exempt interest rate