An article is released detailing how Tech Company A has created software that is currently the best on the market. Tech Company A is expected to gain a major portion of market share for this type of software. One of your clients reads the article and buys a sizeable amount of the stock of Tech Company A. Six months later, an article is released which details a new form of software released by Tech Company Z. The new software may revolutionize the industry currently dominated by Tech Company A. As a result, Tech Company A's stock drops significantly.
Which best describes this scenario?

A) This is an example of event risk.
B) This is an example of market risk.
C) This is an example of competitive risk.
D) This is an example of business risk.