question_answer

Climatologist warm of a tipping point when global temperature trigger catastrophic events and rise levels rise more than 50 feet?s. What would cause the sea level rise so greatly and how much warmer does the world need to get for this tripping point to happen

1. \[1{}^\circ C\]

2. \[3{}^\circ C\]

3. Melting of Greenland ice sheet

4. thermal expansion of oceans

Which of the above is/are correct?

A)  1 and 3           

B)  1 and 3

C)  2 and 3           

D)  2 and 4