Which of the following best completes the sentence 'The ______ considers the situation analysis,target audience,and objectives to guide the zones of social media that the brand can best use to reach and engage the target audience while the ______ will guide the brand's activities in a way that fits with the objectives.'?

A) Strategy,pillars.
B) Strategy,tactics.
C) Tactics,pillars.
D) Tactics,strategy.
E) None of these.

The sentence is describing a process where an entity is using a strategy to guide its social media activities, and the activities are directed towards achieving specific objectives. The first part of the sentence describes the components of the strategy - situation analysis, target audience, and objectives - which help to determine the best zones of social media for the brand. The second part of the sentence indicates that the tactics, or specific activities that the brand will carry out, will be guided by the strategy and tailored to fit with the overall objectives. The best choice to complete the sentence is therefore B - Strategy, tactics.