Which of the Following Is NOT a Factor That a Manager

Which of the following is NOT a factor that a manager should bear in mind when estimating a project's revenues and costs?

A) The prices of technology products tend to fall over time as newer, superior technologies emerge and production costs decline.
B) Sales of a product will typically accelerate, stabilise, and then decline as the product becomes outdated or faces increased competition.
C) Prices and costs tend to rise with the general level of inflation in the economy.
D) A new product typically has its highest sales immediately after release as customers are attracted by the novelty of the product.