Which Statement is correct when it comes to investing in Cash?

Select one:

a.Some capital growth is typically offered for cash investments if the interest rate is greater than 10% per annum

b.Cash returns always allow an investor to maintain their investment capital hedged against the effects of inflation

c.The 90-day treasury note is used as a proxy for both cash and fixed interest

d.The returns on cash are based on the cyclical nature of interest rates