This Graph Shows Which of the Following

This graph shows which of the following?

A) There is a positive correlation between the sale/consumption of organic food and the number of individuals diagnosed with autism between 1998 and 2007.
B) The increased consumption of organic food has led to an increase in the rate of autism between 1998 and 2007.
C) Consuming organic food causes autism.
D) There is positive evidence that a cause-and-effect relationship exists between the consumption of organic food and the development of autism.