Select the most appropriate option to fill in blank no. 1.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. used.
The blank is in the context of describing what posters are typically used for. The sentence structure suggests that "are" is already present, indicating that we need a past participle form of a verb to match with "are" to form the passive voice.
So, the correct option is "used," which is the past participle form of the verb "use."
It fits grammatically and contextually to complete the sentence in a grammatically correct manner.