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A strong thesis is specific, arguable, and previews reasons that will be developed in the essay. Choice B asserts a clear claim (“Cities should increase … funding”) and offers three defendable reasons—traffic reduction, lower emissions, and job access—creating a roadmap for body paragraphs. This aligns with HiSET Writing expectations that a thesis guide organization and justify a position with evidence. Option A is vague and lacks an argumentative stance. Option C states a fact rather than a claim to be proven. Option D is overly general and unsubstantiated. Effective thesis statements help coherence and cohesion: each reason can correspond to a paragraph with evidence (e.g., congestion metrics, emissions data, commute studies). The specificity of B invites relevant support and counterargument (e.g., cost considerations), enabling a balanced, persuasive essay. Hence, B is correct.