The primary message of this poster is that California has the most plentiful resources for people who want a healthy lifestyle. So the correct option is D.
<u>Explanation:</u>
A poster’s job is to promote an idea, event, product or person. So here the poster of California promotes itself as a place full of resources that offers people staying there a healthy and peacefullifestyle. It is a way of advertising and to spread the message. California is generally a good place to stay in. It is the best place for immigrants who seek to find a living for themselves. That’s what the poster would help to do, attract more immigrants to the place.
