Choices 2 and 5 are correct. The other sentences use too many commas and periods in the wrong placements. If you read it out and pause at each comma and period, the others will sound wrong to the ear. Hope this helps! :)
<span>The significant about the structure of “Hills Like White Elephants” are </span><span>The story has lots of unexpected plot twists.and
</span>The story occurs over the course of a single conversation. Hills Like WHite Elephants is a <span>short story by Ernest Hemingway.</span>
