Final answer:
The diameter of a llama's hair is approximately 3 x 10⁻³ centimeter, which can be expressed in standard form as 0.003 centimeter.
Step-by-step explanation:
The diameter of a llama's hair is approximately 3 x 10⁻³ centimeter. To express this diameter in standard form, we need to convert it to a decimal form. To do this, we move the decimal point three places to the right, resulting in 0.003 centimeter. Therefore, the correct answer is C) 0.003 centimeter.