Concept:The Earth rotates 360∘ in 24 hours, so 15∘ of longitude equals 1 hour of time difference.Explanation:Longitude 15∘E is east of 0∘.Time increases as we move eastward.Since 15∘ corresponds to 1 hour, add 1 hour to 12 noon.So, the time is 1:00 pm.Answer:C. 1:00 pm