C-10-Q010mediumsingle_mcqThe expansion of (1+y)2(1+y)^2(1+y)2 is —a1+y+y21+y+y^21+y+y2b1+2y+y21+2y+y^21+2y+y2c1+y21+y^21+y2d2+2y+y22+2y+y^22+2y+y2