For the following description of data, identify the W's, name the variables, specify for each variable whether its use indicates it should be treated as categorical or quantitative, and for any quantitative variable identify the units in which it was measured (or note that they were not provided). Specify whether the data come from a designed survey or experiment. Are the variables time series or cross-sectional? Report any concerns you have as well. An online survey of students in a large MBA Economics class at a business school in the northeastern United States asked them to report their total personal investment in the stock market (S), total number of shares of stocks currently held, total invested in mutual funds (S), and the name of each mutual fund in which they have invested. The data were used in the aggregate for classroom illustrations. Who was measured?

A. Students in a large MBA Economics class
B. Students in the northeastern United States
C. Students at a business school
D. This information is not given.