Your answer is (4) controlling the supply of oil to raise prices
The law mergers when the effect may be substantially to lessen competition or tend to create a monopoly. Three basic kinds of mergers may have this effect: Horizontal mergers, which involve two competitors; vertical mergers, which involve firms in a buyer - seller relationship; and potential competiton mergers, in which the buyer is likely to enter the market and become a potential competitor of the seller, or vice versa.
I believe the correct answer from the choices listed above is option B. An incentive is defined as <span>a gesture or a reward to increase productivity or motivation. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>