To find the unit price per can, you need to divide the total price of the package by the number of cans in the package.
Total price: $3.72
Number of cans: 12
Unit price per can = Total price / Number of cans
Unit price per can = $3.72 / 12
Calculating this gives:
\[ Unit , price , per , can = \frac{3.72}{12} \approx 0.31 \]
So the correct answer is B. $0.31.