(2x)(10x)

A) 20x

B) 12x

C) 20x^2

D) 5x

C) 20x^2

To simplify the expression (2x)(10x), you can use the distributive property of multiplication.

Step 1: Multiply the coefficients (numbers in front of the variables): 2 * 10 = 20.

Step 2: Multiply the variables: x * x = x^2.

Therefore, the simplified expression is 20x^2.

C) 20x^2 is the correct answer.