Final answer:
Option B, 'I had finally managed to dive from the highest platform,' is the most precise replacement for sentence 5 in the narrative, as it specifies the exact accomplishment of the character.
Step-by-step explanation:
The correct answer to the question of which sentence could replace sentence 5 to make the paragraph more precise is indeed option B: I had finally managed to dive from the highest platform. This answer is chosen because it specifies exactly what the achievement was that Liam had set out to accomplish. Despite this being the more precise choice, it is common for students to incorrectly choose other options due to misunderstanding the precision of the sentence or the context provided in the narrative.
In attempts to improve precision in writing, identifying details that specify the exact action or achievement can provide clarity for the reader. It is often a good practice to reread the paragraph to ensure understanding of the narrative's context before determining which detail adds the most clarity and precision to the writing.