Concept:The sentence uses "while" to show a contrast between Bayo and Tayo.Explanation:Bayo is described as careless, meaning he is not careful or thorough.The word "while" signals that Tayo has the opposite quality.The opposite of careless is "meticulous," which means very careful and precise.Options A, C, and D do not mean the opposite of careless.Therefore, Tayo is meticulous.Answer:B. meticulous