Your married customers, ages 48 and 50, have a combined annual income of more than $200,000. they are concerned about the effects of rising inflation, and since they are heavily invested in bonds, they seek to invest a portion of their portfolio in a fund that will provide additional diversification. which of the following mutual funds is the most suitable for these customers?
a. atf overseas opportunities fund.
b. navco tax-free municipal bond fund.
c. abc investment-grade bond fund.
d. xyz government income fund.