Give the single best answer

Select one:

a. None of the other answers are correct

b. Albert Einstein was not able to develop his theories of special relativity (1905) and general relativity (1915-1916) until he was able to use George Dantzig's simplex algorithm

c. Adding more constraints either leaves the feasible region the same or makes it smaller

d. In a spreadsheet, an absolute cell reference and a relative cell reference are different expressions for the same thing

e. Adding more constraints either leaves the feasible region the same or makes it bigger

f. In a spreadsheet, when copying a relative cell reference to a different position, it will have the same value - but copying an absolute cell reference will cause the value to change

g. In a spreadsheet, it is not permitted to mix absolute and relative cell references - i.e., it is not permitted to have a cell reference which is partly absolute and partly relative