Which of the following is equivalent to x³-y³?

This option incorrectly applies the difference of cubes formula. The second factor should include (+xy) instead of (-xy). Therefore, although it starts with the correct ((x - y)) term, the second part does not correspond with the proper factorization of (x^3 - y^3).

While this option maintains the correct ((x - y)) factor, the second factor is also incorrect. The term (+y^2) should be (+xy) to accurately reflect the factorization of the difference of cubes. Thus, it does not equate to (x^3 - y^3).

This option incorrectly starts with ((x + y)) instead of ((x - y)), which is essential for the difference of cubes. Moreover, the second factor does not match the correct form. This misalignment renders it a non-equivalent expression for (x^3 - y^3).

Similar to option D, this choice incorrectly uses ((x + y)) instead of the required ((x - y)). Even though it has a polynomial structure, it cannot represent (x^3 - y^3) accurately due to both the incorrect leading term and the wrong sign in the last part of the second factor.