Are collected from several entities at the same point in time.
a. cross-sectional data
b. categorical and quantitative data
c. time series data
d. random data

a) Cross-sectional data

Explanation: Cross -sectional data is the data/information that is based on the statistics and certain time instance.This data covers the particular time range that can be of a year, month , hour etc. for the several other components and then creates the statistic chart .

Other options are incorrect because they don't measure the data by observing it at the particular time instance/period.Thus the correct option is option(a).

i do not get the question.

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