The rule for controls is that
OA) controls are only necessary if you're not doing an experiment
OB) everything should remain the same between experimental groups
there should be only one independent variable and one dependent
variable
OD
the only change we make between experimental groups is to the
independent variable
OC

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.