What distinguishes the short run from the long run?
A) In the short run, all inputs are variable, and in the long run, all inputs are variable.
B) In the short run, some inputs are fixed, and in the long run, some inputs are fixed.
C) In the short run, some inputs are fixed, while in the long run, all inputs are variable.
D) In the short run, all inputs are variable, while in the long run, some inputs are fixed.