B. Keep searches specific and avoid wildcards where possible (Option B): Narrowing down your search criteria and avoiding broad wildcard searches can improve search performance and accuracy. It helps to get more targeted results and reduces the load on the system.

D. Use Find in “ALL FIELDS” for faster searches (Option D): When you want to search across multiple fields, using “ALL FIELDS” can be more efficient than specifying individual fields. It simplifies the query and allows SOSL to search across all searchable fields, leading to faster searches.

Option A (Use searches against single Objects for greater speed and accuracy) is not accurate. SOSL is designed to search across multiple objects simultaneously.

Option C (Use SOSL option to ignore custom indexes as search fields are pre-indexed) is not a correct statement. SOSL does leverage custom indexes, and there isn’t an explicit option to ignore them.