Final answer:
All the statements about the wind power industry are true: the significant growth reasons (A), the top markets in 2007 (B), and the variability of electricity generation (C). Therefore, the correct answer is D - all of the above are true.
Step-by-step explanation:
The question is regarding the statements about the growth and impact of the wind power industry. Let's evaluate each statement separately:
- Statement A - This is true. The growth in the wind power industry can be attributed to factors like diversification of energy sources, environmental concerns regarding fossil fuels, and various regulatory mandates and incentives. Wind energy is seen as a renewable, cleaner alternative to fossil fuels and has seen significant investment and development as a result.
- Statement B - While this might have been true at a certain point in time, this statement would need to be verified with the latest statistics to confirm if Germany, the USA, and Spain are currently the top wind power markets. However, considering the question specifies the year 2007, it matches historical data for that time period, making it true.
- Statement C - This is true. The amount of electricity generated by wind turbines does indeed vary constantly due to the intermittent nature of wind, which can change in speed and consistency, affecting the output of wind energy generation systems.
Considering the analysis above, the correct option is D - all of the above are true.