Suppose That the Temperature $T$ Is About $T_{E} / 9$ For a Certain Einstein Solid

Multiple Choice

Suppose that the temperature $T$ is about $T_{E} / 9$ for a certain Einstein solid. The probability that an oscillator in that solid will have one unit of energy is closest to
(Hint: See equation $T 4.32$ for how to calculate $Z$ .)
Equation T4.32:
$$1+x+x^{2}+\ldots=\frac{1}{1-x}$$

A) 1
B) $1 / 9$
C) $1 / 81$
D) $1 / 8000$
E) $1 / 10^{9}$