D&B Designs has been in the landscape design business in Pleasantville for the past twenty years. As the "first mover" in the market, the company has built a strong market share over the years and is the best-known firm in the area. The company strength increased steadily, and now stands at fifty employees. Which of the following, if true, would make the company's business environment more uncertain?
A.
Demand for landscaping services dips every autumn and winter.
B.
A long-time competitor quit the landscape design business last year.
C.
Homeowners in the area take pride in their gardens and are avid do-it-yourself gardeners.
D.
Zoning laws in the area change as each new city council comes into power.