Final answer:
The most effective tool to use when levering floor boards into place is the prybar. Chisel, screwdriver or wood rasp would not be as effective at performing this task.
Step-by-step explanation:
When it comes to the task of levering floor boards into place, the most effective tool to use would be the prybar. A prybar is designed specifically for these types of tasks due to its size, shape, and weight—characteristics that allow it to effectively exert force and apply leverage when necessary. Using options B, C, or D such as a chisel, screwdriver, or wood rasp, would not be as effective for levering. These tools have other specific uses in construction, but forcing floor boards into place is not among them. Thus, the correct answer to your question would be option A: Prybar.
Learn more about Prybar