Identify the Largest Number Expressible in a Simple Grouping System $b$

Multiple Choice

Identify the largest number expressible in a simple grouping system with the specified base and specified number of distinct symbols.
-base $b$ , eight distinct symbols (where $b$ is any counting number 2 or greater)

A) $8 ^ { b } - 1$
B) $b ^ { 8 } - 1$
C) $b ^ { 8 }$
D) $8 \mathrm {~b} - 1$