College Algebra CLEP Prep Practice Exam

Option A is incorrect because the exponents are not correctly multiplied, resulting in an incorrect final answer.

Option B is incorrect because only the exponents of x and y are simplified, leaving the numerical 2 and 4 unchanged.

Option D is incorrect because the exponents of x and y are multiplied but the numerical 8 is not properly raised to the 4th power.

The correct answer is C because both the numerical and variable parts are correctly simplified by multiplying the exponents. Therefore, the final answer is 4x6y7/8xy4.