I believe the correct answer is: She could start with the last sentence instead, allowing suspense to build as the reader wonders why she is hesitant to ask if Grandma June needs help.
The most effective way for Lucy to tell her story, if she wants to create more suspense in this paragraph of the narrative, is to start with the last sentence instead, allowing suspense to build as the reader wonders why she is hesitant to ask if Grandma June needs help.