Read the hypothesis below and answer the question that follows. Individuals who smoke will have a higher frequency of developing cancer later in life.
Which of the following would not be a potential extraneous variable for the stated hypothesis?

A. the occurrence of lung cancer in subjects

B. exposure to secondhand smoke

C. the amount of cigarettes smoked per day by subject

D. the number of years as a smoker

Ori works at a flower shop in her town. when customers come in to purchase flowers as gifts, lori takes the time to really listen to their needs so she can recommend the perfect bouquet to them. as a result, lori's customers leave happy and return to this shop whenever they need to give a gift. lori's co-workers like her because she gets along with everyone and compliments them on the bouquets they have put together. what workplace habit does lori demonstrate?