Democratic Centralism doesn’t put forth a single option and hopes everyone agrees on it, it requires that the results of voting are followed through even if you individually disagree with the majority. I think reading this article may help you better understand it, but here’s an excerpt:

In party meetings, a motion (new policy or amendment, goal, plan or any other kind of political question) is proposed. After a period of debate, a vote is taken. If the decision passes, all party members are expected to follow that decision, and not continue propagandizing or otherwise working against it, even if they disagree with it. In the development of socialism in the Soviet Union and China, democratic centralism was largely taken up in response to instability following their respective revolutions which required faster mechanisms of decision-making.

The decision can always be recalled if there is grounds for it, but until it is cancelled, all members of the party are expected to uphold it as if they agreed with it.

Consensus is generally sought over pure results, and there is often a lengthy period of debates before a decision is put to the vote. The debate period is used to refine the proposal that will be voted on until all (or most) members agree to it.

What is the alternative, as Cowbee answered.