You're leading a team that is working to develop a mobile technology campaign around cardiovascular health for women in Racine, Wisconsin. You've done a thorough review of the data and have determined that the population most affected by cardiovascular disease is middle-class White women aged 45 to 65. Based on the Lefebvre article, what is the most important variable to consider when segmenting your target audience for the mobile technology campaign?

a. Race/ethnicity

b. How the target population uses its cell phones

c. Geographic location

d. The frequency in which the target population uses its cell phones

e. Socioeconomic status

f. Age range