What is the advantage in using a simple machine?

reduces the amount of work needed to move an object.
increase the mechanical advantage by increasing the effort force that is applied.

reduce the amount of energy required.

reduce the work needed to effort force applied ration.

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous