What evidence does gore use to support his argument about the dangers of global warming?

To support his argument about the dangers of global warming, Gore cites two scientific studies.  Option C is correct.

In this excerpt he mentions two scientific studies, one according to which the falling of a cliff could be completely gone during summer in less that 22 years and, the other one that holds that it could happen in less than 7 days.

Al gore is a climate campaigner who warns about the climate change.

In accordance with the former US vice-president and climate campaigner, Al Gore, we count on clear proof that climate change caused the extreme and devastating floods, storms and droughts that displaced millions of people.

He claims that the fight against global warming is one of humanity’s great moral movements, as well as the abolition of slavery, the defeat of apartheid, votes for women and gay rights.