Eliza takes care to illustrate in her research report how long she was in the field and how she has minimized observer effects. In her efforts to address these concerns, Eliza is most directly addressing:.a. threats to internal validity. b. threats to external validity. c. ethics concernsd. reliability

Gwen, a manager at exude apparels inc., received a message from a customer requesting a replacement for a purchased pair of shoes. exude apparels has a clearly stated no-return policy. gwen responded to the customer denying the request in a tactful and clear manner. despite this, the customer submitted a second request. in this scenario, which of the following is an appropriate response to the second request?