Question

\a person shouldnt have a cell phone until theyre 18. children dont know how to use phones responsibly.\
how can you help her combine these sentences to add variety to her sentence structures?
○ although children dont know how to use cell phones responsibly, they shouldnt have them until theyre 18.
○ because children dont know how to use cell phones responsibly, they shouldnt have them until theyre 18.
○ cell phones; children shouldnt have them until theyre 18 because they dont know how to use them responsibly.
○ children shouldnt have cell phones until theyre 18: children dont know how to use them responsibly.

Explanation:

To combine the sentences and add variety, we need to show the causal relationship between children not knowing how to use phones responsibly and them not having phones until 18. The option "Because children don't know how to use cell phones responsibly, they shouldn't have them until they're 18." uses the conjunction "because" to correctly establish this cause - effect relationship and also varies the sentence structure from the original simple statements. The first option uses "although" which implies a contrast, not the correct relationship here. The third option has an incorrect punctuation (semicolon usage) and a less smooth structure. The fourth option uses a colon which is not the best way to show the causal relationship and also has a less varied structure compared to the "because" - led sentence.

Answer:

B. Because children don't know how to use cell phones responsibly, they shouldn't have them until they're 18.