An experiment is set up to measure the effect of a gasoline additive on fuel consumption rate (miles per gallon, or mpg). what would be the control in this experiment?
a. the highest mpg observation
b. the smallest car available for the experiment
c. the mpg measurement in the observation that has no additive
d. the mpg measurement of the first observation using the additive

c. a group of tribes that formed a confederacy

one of the central themes of edward abbey's work has been his staunch opposition to the glen canyon dam on the colorado river that created lake powell, destroying stunning scenery and wildlife habitat, endangering many rare species of fish and animals, and also irreparably destroying many important archaeological sites which provided information about the early inhabitants of the united states.

awnser: william shakespeare was an english poet, playwright, and actor, widely regarded as the greatest writer in the english language and the world's pre-eminent dramatist.