The first three options I see are all making-decision process to take action, but the last one is the one that is not like that. Researching is something that is not so close in meaning to what you need. That is why, D is a good option.
They will supply more products to gain more profit.
<span>Proposed a law to take land back from the Senators and give it to the landless. This was very popular with the masses. Opponents organized a riot where he was killed.</span>
