They are the same because if u simplify both fractions they are both 1/4
The answer is A.
If the bicipe muscle contracts it will bring the forearm up because the insertion of this muscle is in the forearm.
One of the functions of this muscle is flexing the elbow, which would result in the action i already mentioned.
It couldn't be B, because that would be the work of another muscle, the triceps.
A heterogeneous mixture is made of different materials that can easily be separated.
