Consider the following fixed proportions technologies: . Technology A uses 3 units of labour and 6 units of capital to produce 10 units of output. Technology B uses 8 units of labour and 4 units of capital to produce 10 units of output. The firm has 10 units of labour and 10 units of capital. It can use either of the technologies, or combine the two in its production. The maximum amount of output the firm can produce is O fewer than 10 units between 10 and 15 units O between 15 and 20 units between 20 and 25 units O greater than 25 units