Mordor has just been added as the 51st state in the United States. When people go to vote in presidential primaries in Mordor, they get to decide on the day of the election if they are going to vote in the Republican or Democratic primary. This is an example of what kind of primary:

a. runoffb. openc. pluralityd. closed

B. Open

Explanation: Before a general election is conducted, Registered parties such as democrats and republican will have to provide a single candidate who will be the flag bearer of the party during the General election. The candidate will emerge from a group of nominees vying for that post within the party through an electoral process called the primary election where members of the public decide who will be the flag bearer of a particular party. The emerging party candidate or flag bearer will be selected through one of different primary voting systems. When voters do not have to pre-register or portray any sort of affiliation towards a political party before casting their vote in a primary election, meaning a voter can simply walk up to the polling center and then decide whether to participate in either the republican or Democrat primary, this is called an open primary. This is different from when voters need to be pre-registered or affiliated to a particular party before going to the polls, this is called a closed primary. However, in both cases voters can only participate in the primary election of a single political party, either democrat or republican.

using the scientific method.