To calculate the population density, you can use the formula:
\[ \text{Population Density} = \frac{\text{Population}}{\text{Area}} \]
In this case, the population of Canada is 39,292,355 people and the area is 3,855,100 square miles.
Now, let's perform the calculation:
\[ \text{Population Density} = \frac{39,292,355}{3,855,100} \approx 10.19 \text{ people per square mile} \]
So, rounding this to whole numbers, the population density is approximately 10 people per square mile.
Thus, the correct answer is:
10 people per square mile