Fill in the blanks with the most appropriate option:-

Last year, the majority of the workers …………. demanding an increase in their wages.

were

The correct option to fill in the blank is were.

The sentence is about the majority of the workers demanding an increase in their wages in the past. The verb "were" is used in the past tense to talk about something that happened in the past.

The other options are not as appropriate:

• Is is the present tense of "be". It would not be accurate to use the present tense, as the action of demanding an increase in wages happened in the past.
• Was is the singular form of "were". It would not be accurate to use the singular form, as the majority of the workers is a plural noun.
• Are is the present tense of "be". It would not be accurate to use the present tense, as the action of demanding an increase in wages happened in the past.