A multi-party system<span> is a system in which multiple political parties across the political spectrum run for national election, and all have the capacity to gain control of government offices, separately or in a </span>coalition.
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Multi-party systems tend to be more common in </span>parliamentary systems<span> than </span>presidential systems<span>, and far more common in countries that use </span>proportional representation<span> compared to countries that use </span>first-past-the-post<span> elections.</span>
Social needs and the need to belong to a group.
It's between b and c because they are good examples but c is more recommended
