<span>There are several major characteristics of a grand opera. A grand opera has large scale casts, orchestras, stage effects, and lavish designs. The grand operas have four to five acts in each one. The plots of the grand opera is is usually based on historic events and they are dramatized. These operas are also known by the saying "serious opera without spoken dialogue." </span>
<span>Britain is the correct answer. Blueprints were invented by John Herschel in 1842. Herschel was British chemist who discovered how to use cyanotype paper to create the distinctive blue and white blueprint drawings.</span>
