Final answer:
B) OpEx
For a high-risk experimental solution, using OpEx is often preferred as it records expenses immediately and aligns with the uncertain outcome of the project.
Step-by-step explanation:
When a company is experimenting with a new solution that has a high risk of failure, the preferred way to account for the related expenditures is often through OpEx (Operating Expense). OpEx allows for the expenses of the project to be recorded immediately, which may be beneficial if the project fails and there is no long-term asset to capitalize. If the company pursued a CapEx (Capital Expenditure) approach, this would imply capitalizing the expense and amortizing it over the expected life of the asset, which could be problematic if the asset fails early or does not deliver the expected value.