Answer:
An example of primary data that Armstrong could use in this research project is:
d. Discussions among focus groups made up of small number of gardeners led by an interviewer.
Step-by-step explanation:
Primary data is directly collected by the researcher. It is the opposite of secondary data, which is data collected from primary sources and made available for use in a research. Primary data is first-hand information collected during a research project. Focusing on the discussions by gardeners will enable Armstrong to assess their perceptions about rose as a high-maintenance plant.