The CRED model showed that the CRED Damages scenario had a 1.5% chance of keeping warming to less than 2 degrees Celsius. So The correct answer is c. 1.5%.
The CRED Damages scenario is a hypothetical scenario where there is extensive damage to the global economy from climate change. In this scenario, the CRED model showed that there is only a 1.5% chance of keeping global warming below 2 degrees Celsius.
Here are the probabilities of keeping warming below 2 degrees Celsius for the other scenarios:
CRED Reference: 83%
CRED High Mitigation: 57%
CRED Low Mitigation: 0.1%
As you can see, the CRED Damages scenario has the lowest probability of keeping warming below 2 degrees Celsius. This is because the extensive damage to the economy in this scenario would make it very difficult to implement the necessary mitigation measures.