Final answer:
The expression (0.791 x 100) is modeled by moving the decimal point two places to the right, resulting in 79.1, which is answer choice C.
Step-by-step explanation:
To model the expression (0.791 x 100), we multiply 0.791 by 100. When we multiply any number by 100, we essentially move the decimal point two places to the right. Doing so with 0.791 gives us 79.1.
Therefore, the correct answer is C. 79.1.