Final answer:
Tactical planning involves organizing a company's short-term objectives and developing strategies to achieve them, typically conducted at various management levels, not exclusively at the top.
Step-by-step explanation:
The question pertains to tactical planning in a business context. Tactical planning is not singularly designed to deal with advertising and marketing questions, nor is it solely focused on global-scale issues such as products, capital, and research. It is also not conducted exclusively at the highest levels of management and does include plans made at local levels.
Therefore, based on these characteristics, tactical planning is most associated with the methodical organization of a company's short-term objectives and the development of actionable strategies to achieve them. Hence, the most correct statement about tactical planning among the given options is that it is conducted at the highest levels of management.
Military strategy, corporate advertising impacts, product advertising, and regional planning contexts provided in the reference information can inform understanding of tactical planning, but do not directly correspond to the provided answer options.