Rosa Works at a Gelato Shop and Observes That the Number

Multiple Choice

Rosa works at a gelato shop and observes that the number of people buying gelato varies greatly from day to day. For a couple of weeks, she has recorded the number of people at the shop each day, as well as the daily temperature, and has observed a positive relationship between temperature and the number of customers. Based on her observations, Rosa should

A) conclude definitively that people buy more gelato when the temperature rises.
B) determine if there are other relevant factors and attempt to hold these constant before drawing conclusions.
C) continue to gather data on the number of visitors and daily temperatures, because eventually other relevant variables will not matter.
D) throw out the data if it does not show a perfect relationship between buying habits and temperature.