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 5.

The correct option is injustice.

Let us analyze the context of the passage to determine the correct word for blank number 5:
The sentence reads: "Starting from MeToo to Black Lives Matter, digital networks (4) ______ indispensable in bringing together critical voices against social and political (5) ______"

1. The movements mentioned—MeToo and Black Lives Matter—are prominent campaigns that raise voices and organize protests against social inequality, sexual harassment, systemic racism, and unfair treatment.
2. These issues are examples of social inequality or unfairness, which is defined as injustice.
3. The phrase "critical voices against..." indicates that the voices are opposing something negative. Therefore, they are opposing social and political "injustice", rather than positive or neutral concepts like "democracy", "election", or "justice".
4. Thus, "injustice" is the most appropriate and logically fitting option for blank number 5.