Goal Post Brewing Company Asked Their Bartenders to Talk with Customers

Goal Post Brewing Company asked their bartenders to talk with customers over the course of a weekend on which beers they'd like to see Goal Post offer in the future. Based on feedback from the bartenders, Goal Post introduced a new, more expensive beer in their taproom a week later. Then, Goal Post monitored the total sales by glass once the new beer was introduced to determine if customers were willing to pay more money for the new beer relative to their existing beer. What was the sequence of data sources and data collection methods that Goal Post followed? Choose the BEST answer.

A) Primary and personal interviews, then, primary and technological scanning
B) Secondary and survey, then, primary and observation
C) Secondary and observation, then, primary and personal interview
D) Primary and focus group, then, secondary and personal interview