C-03-Q118mediumsingle_mcqx4−y4=?x^4 - y^4 = ?x4−y4=?a(x2+y2)(x+y)(x−y)(x^2+y^2)(x+y)(x-y)(x2+y2)(x+y)(x−y)b(x2+y2)2(x^2+y^2)^2(x2+y2)2c(x−y)4(x-y)^4(x−y)4d(x+y)4(x+y)^4(x+y)4