Operations research applications, particularly linear programming is now a standard method used in a variety of areas and processes. Some of these are urban planning, currency arbitrage, investment, production planning, inventory control, blending and refining, manpower planning, agricultural planning, diet & nutrition, transportation and, logistics.

As also understood from the information given, all of the areas in the options are among the ones in which operations research applications, particularly linear programming, are now used as a standard method for decision making, so the correct answer is E.