In the following diagram, three different products (in thousands) produced by a company in 5 years are given and after studying them carefully, answer the following questions.

Three products produced by a company in different years (in thousands)

Q:

What is the difference between the CD produced between the year 2007 and the year 2009?

• 1
  20,000
• 2
  15,000
• 3
  5,000
• 4
  500