Final answer:
A dictionary should be used sparingly when verifying spellings if the internet or witness/counsel do not provide confirmed spellings. It is a supportive tool to ensure accuracy but should not be overutilized if there are quicker, reliable resources available.
Step-by-step explanation:
The question asks when a student should use a dictionary if the internet or witness/counsel do not have verified spelling. The correct answer is C) Sparingly. This implies that while resources like a dictionary should be used when necessary, they should not be over-relied upon, especially if other more certain sources of spelling confirmation are available.
Using a dictionary can be essential for ensuring the accuracy of spelling in formal documents such as legal paperwork or academic writing. However, it's also important to be efficient and make use of more immediate and verified sources when they are available, to avoid unnecessary delays. Therefore, one should use a dictionary sparingly in situations where more reliable sources for spelling are accessible.