What Is the Effect of the Translation $f(x-3 a)+b$ On the Graph of the Function

Multiple Choice

What is the effect of the translation $f(x-3 a) +b$ on the graph of the function $f(x)$ ? Assume $a$ and $b$ are positive constants.

A) Shift right $3 a$ , then up $b$ .
B) Shift right $3 a$ , then down $b$ .
C) Shift left $3 a$ , then up $b$ .
D) Shift left $3 a$ , then down $b$ .