Arctic sea ice melts back during summer and grows or "recovers" during winter. The winter maximum extent is usually reached in March. The graph below shows Arctic sea ice extent every September since 1984. At what point in the data is climate change evident by Arctic ice melting?

Arctic ice extent in the year 2016 is equal to Arctic ice extent in 1984.

Arctic ice extent is lowest in September 2016 and highest in 1984.

In 2016, Arctic ice is half of what it once was compared to 1984.

The Arctic ice extent was highest between 2000 and 2016.