As per the Fair Work Act 2009, which of the following is a situation where adverse action is taken against a contractor who has already been engaged? Group of answer choices a) A person who has entered into a contract for services with an independent contractor injures the independent contractor about the terms and conditions of the contract. b) A person who has entered into a contract for services with an independent contractor refuses to make use of or agree to use services offered by the independent contractor. c) A person who has entered into a contract for services with an independent contractor refuses to supply or agree to supply goods or services to the independent contractor. d) All of the above