If xy = a+2a−2,xy = a+2a−2, then the value of x2−y2x2+y2x2−y2x2+y2 = ?

• A. 2aa2+22aa2+22aa2+22aa2+22aa2+22aa2+22aa2+22aa2+22aa2+22aa2+22a2a2a2aa2+2a2+2a2+2a2a2a2a2aa22+22aa2+2
• B. 4aa2+44aa2+44aa2+44aa2+44aa2+44aa2+44aa2+44aa2+44aa2+44aa2+44a4a4a4aa2+4a2+4a2+4a2a2a2a2aa22+44aa2+4
• C. 2aa2+42aa2+42aa2+42aa2+42aa2+42aa2+42aa2+42aa2+42aa2+42aa2+42a2a2a2aa2+4a2+4a2+4a2a2a2a2aa22+42aa2+4
• D. 4aa2+24aa2+24aa2+24aa2+24aa2+24aa2+24aa2+24aa2+24aa2+24aa2+24a4a4a4aa2+2a2+2a2+2a2a2a2a2aa22+24aa2+2