If A is an m × n matrix, B is a p × q matrix, C is an m × q matrix, and 8A + B - \frac{1}{2}C is a p × n matrix,
what must be true about m, n, p, and q.
(a) m = p and n = q
(b) 8m = p and 8n = q
(c) p = \frac{1}{2}m and \frac{1}{2}q = q
(d) m = n = p = q
(e) There are no such values that make 8A + B - \frac{1}{2}C a valid operation.