When referring to the aggregate supply curve, what time period is represented by the short run?

Select one:

a.the time period in which neither the prices of output nor the prices of inputs are able to change

b.any time period of less than one month

c.the time period in which output prices can change in response to supply and demand, but in which all input prices have NOT yet been able to completely adjust

d.any time period greater than one month but less than a year

Clear my choice