Why was the eruption of Vesuvius unexpected for the people of ancient Pompeii?

The following statement is an example of which type of opener? "hi, let me give you a hand with that." \ a. self-references 2.other references 3.relational references 4.context references

Rewrite the sentence, using colloquial speech. what are you doing later?

Cara meyakinkan ibu bapa untuk penggunaan peranti yang selamat