Option a cannot be correct since when three is technological stability in the industry environmental uncertainty will remain constant.
Option b cannot be correct since when industry the industry is at an equilibrium state than environmental uncertainty will not be affected.
Option c is correct since environmental complexity affect the environmental uncertainty when environmental complexity is high than environmental uncertainty will be high and when environmental complexity is low than environmental uncertainty will be low.
option d cannot be correct since environmental uncertainty is most likely to be high when environmental change is extensive.