The paragraph below discusses sleep and learning. Choose where the sentence belongs so that transitions and references are most coherent. Sentence to be placed: "Instead of treating that advice as moral discipline, it frames sleep as a condition for learning." Passage: [A] The paragraph begins with the familiar advice to get more sleep. [B] That framing lets the writer discuss schedules, homework loads, and transportation without blaming individual students. [C] The argument becomes institutional before it becomes personal. [D] Readers are asked to design conditions for attention rather than merely to demand better habits.