$8.$ A financial planner tells you that purchasing a $5-$year Treasury bond in your brokerage account is a good idea currently; the current effective market rate is $5\%,$ the current inflation rate is $3\%$ and, therefore, you should make a real return of $2\%$ per year. What important factors has he omitted from his analysis?

a$.$ Income taxes

b$.$ That inflation may rise above $3\%$

c$.$ That you might have to sell the bond before maturity

d$.$ All of the above