Consider the money demand function that takes the form $($M $/$ P$)$d $=$ Y $/(4$i$),$ where M is the quantity of money, P is the price level, Y is real output, and i is the nominal interest rate. What is the average velocity of money in this economy?

A$.$

$1/(4$i$)$

B$.$

$0\mathrm{.}25$

C$.$

i

D$.$

$4$i