TABLE 1-2 A Wall Street Journal poll asked 2,150 adults in the United States a series of questions to find out their view on the U.S. economy. Referring to Table 1-2, the possible responses to the question "How many people in your household are unemployed currently?" result in a :

a. nominal scale variable.

b. an ordinal scale variable.

c. an interval scale variable.

d. a ratio scale variable.