E=mc
 (the 'c' is squared btw.. it has a little 2 at upper right conner)
 To solve for " m " in the formula shown above, you should:
 Select one:
 a. A.) Divide both sides of the equation by c squared.
 b. B.) Subtract c squared from both sides of the equation.
 c. C.) Multiply both sides of the equation by c squared.
 d. D.) Add a negative c squared to both sides of the equation.