Select the most appropriate option to fill in the blank.

He admonished his listeners _________ their wicked ways.

to change

The most appropriate option to fill in the blank is to change.

The sentence is about the speaker admonishing their listeners to change their wicked ways. The infinitive form of the verb "change" is the most appropriate word to use in this context because it expresses the speaker's command or request for their listeners to change their ways.

The other options are not as appropriate.

• Changes is the plural form of the noun "change". This does not make sense in the context of the sentence because the speaker is not talking about multiple changes.
• Changed is the past tense form of the verb "change". This does not make sense in the context of the sentence because the speaker is not talking about something that has already happened.
• Change is the present tense form of the verb "change". This is not as strong as the infinitive form of the verb, and it does not express the speaker's command or request as clearly.