Which of the following, if true, would best explain the discrepancy outlined above?

While specialized skills may slow the installation process, they do not directly account for the drastic drop in capacity from over 1,500 megawatts in 2003 to below 500 megawatts in 2004. If installation skills were a significant barrier, the capacity increase would likely have been gradual rather than plummeting.

Although adverse weather patterns could have impacted the efficiency of existing wind turbines, they do not explain the decline in new installations. The question specifically concerns the number of new megawatts added, which would not be directly affected by the performance of already installed turbines.

This choice suggests an increase in customer options but does not clarify why new installations decreased in 2004. The development of choice does not inherently lead to fewer new projects; in fact, it may have encouraged further investment had other factors (like tax credits) remained favorable.

While increased demand for materials reflects anticipation of growth, it does not explain the subsequent decline in actual installations. If anything, such preparation might have suggested readiness to expand capacity further rather than the opposite.