Which expressions are equivalent to -56z+28−56z+28minus, 56, z, plus, 28? choose 2 answers: choose 2 answers: (choice a, checked) a \dfrac{1}{2}\cdot(-28z+14) 2 1 ⋅(−28z+14)start fraction, 1, divided by, 2, end fraction, dot, left parenthesis, minus, 28, z, plus, 14, right parenthesis (choice b) b (-1.4z+0.7)\times40(−1.4z+0.7)×40le ft parenthesis, minus, 1, point, 4, z, plus, 0, point, 7, right parenthesis, times, 40 (choice c) c (14-7z)\cdot(-4)(14−7z)⋅(−4)left parenthesis, 14, minus, 7, z, right parenthesis, dot, left parenthesis, minus, 4, right parenthesis (choice d) d (8z-)(8z−4)(−7)left parenthesis, 8, z, minus, 4, right parenthesis, left parenthesis, minus, 7, right parenthesis (choice e) e -2(-28z-14)−2(−28z−14)