Definition: You are given a question on business ethics. Business ethics is a form of applied ethics that examines ethical principles and moral or ethical problems that can arise in a business environment. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Negative advertising, stealing or poaching customers and predatory pricing are all strategies employed by businesses described using the umbrella term ________.
(A)Reasonable competitive behaviour (B)Swindles (C)Competitive tricks (D)Dirty tricks

D