Final answer:
All choices are true about the names of variables in SPSS; they cannot contain spaces, begin with a numeral, or contain any special characters.
Step-by-step explanation:
The correct statement about the names of variables in SPSS is:
- They cannot contain spaces.
- They cannot begin with a numeral.
- They cannot contain any special characters.
So, the correct answer is d. All of these choices are true. In SPSS, variable names must be unique and comply with these restrictions for the software to correctly interpret and manage the data. These conventions maintain a clean data structure and prevent potential errors during data analysis.