Answer:
B
Step-by-step explanation:
So lets think about weather and temperature. I mean, one day in summer could be 77 degrees, the next it could be 78, 79, or soething similar.
When yuo look at the summers and springs in 1950, then in 2000, you can see there is a change in 2 or 3 degrees.(increase) This doesnt seem like a raise or lowering, but just a mere normal change in weather. Looking at fall, the temperature is a change in 2 or 3 degrees as well.(decrease) Again, just mere change in weather. Finally, we get to winter. As we can see, winter doesnt change between 1950 and 2000. Considering this normal change in weather, or no change whatsoever, over 50 years, we cannot conlude anything other than there hasnt been a change in tmeperature.
The average temperature for 1950-2000 were almost the same.
Hope this helps ;)