The well - designed experiment test one factor at a time. The answer to the question above is letter A. 1. The items that are being tested are the independent variables and that they cause the dependent variables to change.
1) Remove the chemical 2) Remove any contaminated clothes or jewelry 3) Rinse the burn immediately 4) Loosely apply a bandage or gauze 5) Take an OTC pain reliever 6) Consider a Tetanus shot