When Beverly Holbrook and Peter Jackson Failed to Recruit Participants

When Beverly Holbrook and Peter Jackson failed to recruit participants for a focus group using a traditional marketing-research method that involves calling potential participants, they ________.

A) paid a professional market research firm to recruit their participants
B) offered child care services and reimbursed transportation costs to entice participants
C) used random sampling techniques to ensure their results would be generalizable
D) turned to settings where people would ordinarily meet, talk, and socialize, including mother and toddler centres, seniors' homes, and job clubs