To solve the expression \(8(12) + 7\), we first calculate \(8(12)\):
\[ 8(12) = 96 \]
Then we add \(7\):
\[ 96 + 7 = 103 \]
Now let's interpret the result of \(103\) in terms of the options given:
- Option A: 11 piles of 10 pennies with 7 leftover pennies adds up to \(11 \times 10 + 7 = 110 + 7 = 117\).
- Option B: A rectangular array of 9 pennies long and 12 pennies wide with 5 leftover pennies would be \(9 \times 12 + 5 = 108 + 5 = 113\).
- Option C: 8 stacks of 12 pennies with 7 leftover pennies counts as \(8 \times 12 + 7 = 96 + 7 = 103\).
- Option D: A rectangular array of 6 pennies wide and 20 pennies long with 5 leftover pennies gives us \(6 \times 20 + 5 = 120 + 5 = 125\).
Thus, the correct answer that matches the calculation \(8(12) + 7 = 103\) is:
C. 8 stacks of 12 pennies with 7 leftover pennies.