Match the formula to the financial phrase, where

P is the principal or present value;
r is the nominal interest rate;
t is the time in years;
m is the number of compounding periods per year;
n is the number of compounding periods;

A.P[(1+r/n)^m -1 ]

B. P[(1+r/m)^n - 1]

C.P[e^rn -1]

D.P[e^rt -1]

E. Prt

F.None of the above

which one is simple interest ? I get this one should be E
which one is continuously compound interest?
which one is compound interest ?