In the field experiment description (p. 270), Pedulla (2016) discusses the résumé and cover letter construction. “A résumé and a cover letter were included with each job application. Each cover letter was created with similar language, while also accurately reflecting the work history presented on the résumé.” These characteristics of the cover letter address ______.
a. matching
b. random assignment
c. random selection
d. control over the context
e. the Solomon four-group design