The reader can infer from the article that . A. Altaeros Energies and other companies must have their turbines approved before using them to generate electricity.
B. Fort Felker of the National Wind Technology Center is most concerned about flying turbines colliding with airplanes.
C. Adam Rein would probably advise Altaeros Energies to avoid using old technology used by the government.
D. Cristina Archer is doubtful that companies can solve the problems with tapping high-altitude winds for energy.