It depends what you are writing,some can be factual/informal,others persuasive ect
<span>The question is 'self interest motivate producers to offer ............ products. The correct option is B. In market situations, producers' self interest, which is the desire to make more profit, always motivate producers in supplying products that are more expensive. The profit margins of producing more of an expensive product is usually higher compared to other less expensive products.</span>
I think a biographical dictionary.
Answer:
The Open Window by Saki the author uses a third-person omniscient point of view.
