In a Theoretical Construct of the GHG Damage Cost Function

In a theoretical construct of the GHG damage cost function that shows the relationship between expected future warming and projected future damages to the economy, one can conclude which of the following?

A) Global GDP increases with increases in temperature.
B) The damage function is affected by the past level of technologies.
C) The damage function is affected only by points of discontinuity.
D) Points of discontinuity in any damage function would represent catastrophic changes.
E) All of the above are correct.