Final answer:
The correct answer is Option 4: 7 x 2071.
Step-by-step explanation:
The correct answer is Option 4: 7 x 2071.
To simplify the given expression using the distributive property, we can multiply 7 by each term inside the parentheses and then add the results.
7 x 97 x 21 = (7 x 97) x 21 = 679 x 21 = 14319.
So, the simplified expression is 14319, which matches with Option 4: 7 x 2071.
Learn more about Simplifying using the distributive property