Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. The growth of the electric-power industry stimulated significant changes in hydro technology and scientific progress in electrotechnology in the nineteenth century. B. The changes in hydro technology that led to the growth of the electric-power industry also led to discoveries and developments in electrotechnology in the nineteenth century. C. Advances in electrotechnology in the nineteenth century and changes in hydro technology were responsible for the growth of the electric-power industry. D. In the nineteenth century, the scientific study of electrotechnology and hydro technology benefited greatly from the growth of the electric-power industry.