What is the meaning "changed to fit the evolving Japanese population"?

Read the following passage: sari couldn't believe her bad luck. she had locked her keys in the car. to add fuel to the fire, her cell phone was in the locked car, and she was late for a very important meeting. she knocked on her neighbor's door so that she could ask to use his phone, but he was not not home. what was she to do? what role does the idiom in the passage serve? a. it shows that sari has incredibly bad luck when it comes to work.b. it shows that sari's neighbor was not home either.c. it shows that sari locked her keys in the car.d. it shows that sari's situation was worse than it seemed at first.

It's to know your purpose before you read something because a purpose can:

What is dialogue? a. conversations that takes place between characters b. directions left by the playwright on a script c. instructions that indicate actors' stage positions d. the props that represent a play's physical location