In Syllogism, identify if a link exists between the subjects of the conclusion. Since 'Books' and 'Tools' have no defined relationship in the statements, no definite conclusion can be drawn between them.

A: It is possible but not certain, as the set of tools overlapping with gadgets may or may not overlap with books. B: This is a fallacy; the statement only says some gadgets are tools, not that all tools are gadgets. C: Similar to A, this is a possibility, not a logical necessity.

If the statements do not provide a direct bridge between two subjects, always look for 'Cannot say' or 'Does not follow' as the safest conclusion.