A medical practice invests moncy in a five$-$year treasury note with a $3\%$ interest rate. Three years later, the penctice needs money and sells the note. Which of the following will most likely reduce the sale value of the treasury note?

a$.$ A $1\%$ fall in the prime rate

b$.$ Newly issued two$-$year treasury notes with $4\mathrm{.}5\%$ interest rates

C$.$ A $1\%$ increase in the prime rate

d$.$ Newly issued five$-$year treasury notes with $2\%$ interest rates