Find the General Term $a_n$ , of the Given Geometric Sequence
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Multiple Choice

Find the general term, $a_n$ , of the given geometric sequence
- $8,4,2, \ldots$

A) $a_{n}=8-4(n-1)$
B) $a_{n}=8^{n-1}-4$
C) $a_{n}=8+\frac{1}{2}(n-1)$
D) $a_{n}=8\left(\frac{1}{2}\right) ^{n-1}$