The correct answer is: B. more than 10.
A transistor connected in common collector arrangement has a voltage gain greater than 1. This is because the output voltage is taken from the collector, which is at a higher potential than the emitter. The input voltage is applied to the base, which is at a lower potential than the emitter. This means that the output voltage is amplified relative to the input voltage.
The voltage gain of a transistor connected in common collector arrangement is given by the following equation:
$A_v = \frac{V_{out}}{V_{in}}$
where $A_v$ is the voltage gain, $V_{out}$ is the output voltage, and $V_{in}$ is the input voltage.
The voltage gain of a transistor connected in common collector arrangement can be increased by increasing the collector current. This can be done by increasing the base current or by increasing the collector voltage.
The voltage gain of a transistor connected in common collector arrangement can be decreased by decreasing the collector current. This can be done by decreasing the base current or by decreasing the collector voltage.
The voltage gain of a transistor connected in common collector arrangement is typically in the range of 10 to 100.