How many observations and variables does the data set below contain?

In this item, the correct answer is letter C. In the given data set, there are four observations named Picker, Fletcher, Romano, and Choi. These 4 must be observed with their data. Based on the table given, the sex of Fletcher is not given and Romano’s age is not indicated either. Though there are two missing data, the set still has three variables, not 2.

The two columns (Sex and Age) has 4 rows that need to be filled up. Each column for the variables has missing data. The age of Romano too only has a period symbol, not a numeric value making it having no variable too.