In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

Social media companies (1) ______ claim that they promote democracy and are dedicated to the empowerment of ordinary individuals. The assertion (2) ______ entirely unfounded. Recent history shows how (3) ______ citizens have been mobilised against totalitarian regimes on social networking sites. Starting from MeToo to Black Lives Matter, digital networks citizens have been mobilised against totalitarian regimes on social networking sites. Starting from MeToo to Black Lives Matter, digital networks (4) ______ indispensable in bringing together critical voices against social and political (5) ______

Select the most appropriate option to fill in blank number 3.

The correct option for blank 3 is "common".

Let us analyze the context of the passage to understand why "common" is the most appropriate choice:
The passage discusses the power and claims of social media platforms in promoting democracy and empowering regular individuals. The sentence states: "Recent history shows how ______ citizens have been mobilised against totalitarian regimes on social networking sites."

Let us evaluate each of the given options:
1. neutral: This refers to unbiased or impartial people. However, citizens who mobilize against totalitarian regimes are actively taking a side, so they are not neutral.
2. alien: This refers to foreigners or outsiders. The context is about regular citizens of a country organizing within their own country against their regimes, so "alien" is incorrect.
3. foreign: Similar to alien, this refers to people from another country, which does not fit the context of internal democratic mobilization.
4. common: This refers to ordinary, regular, or everyday people (matching the phrase "empowerment of ordinary individuals" from the first sentence). Mobilizing "common citizens" against oppressive regimes perfectly fits the theme of democratic empowerment of ordinary people.

Therefore, "common" is the correct word to fill in blank (3).