As 4pm is at 16:00 or 16 hours from midnight
- The temperature increased till 4pm according to the graph
Option A is correct
Temperature held constant in between 16:00 and 18:00 it doesn't imply that temperature wasnot recorded
Option B is wrong
After 18 hours the temperature decreased .(after 6 pm)
Option C is correct
First increased till 16:00 then held constant then decreased
D is wrong
Calculate temperature change.
Till 12:00
After 12 till 16:00
E is correct