ABC manufacturing has discovered some suspected collusion among their normal suppliers for raw materials. What options does the supply manager have? Multiple select question. Force the prices down by any means necessary. Seek new sources of supply. Use substitute materials. Do nothing and accept the situation.ABC manufacturing has discovered some suspected collusion among their normal suppliers for raw materials. What options does the supply manager have? Multiple select question. Force the prices down by any means necessary. Seek new sources of supply. Use substitute materials. Do nothing and accept the situation