What type of staff provides guidance on technical topics to the commander?

The special staff is responsible for providing expert guidance and advice on technical topics to the commander. This type of staff typically includes personnel with specialized skills or knowledge in specific areas, such as logistics, intelligence, public affairs, finance, or legal matters. Their expertise enables commanders to make informed decisions in complex situations that require an understanding of technical details.

While the primary staff generally handles broader tactical planning and strategy, they may not have the specialized knowledge that the special staff offers. The coordinating staff works to ensure that various elements of the operation are synchronized and may not delve into technical specifics. Administrative staff focus on organizational and personnel management aspects, which do not typically include specialized technical advice. Therefore, the special staff's role in delivering focused and knowledgeable support on technical matters makes it the correct answer.