To answer this question, you need to understand the different ways to output or display data in programming.
Let's go through each option to understand why it is correct or incorrect:
Option A) echo() - This option is incorrect because the echo() function does not assign the output to a variable. It simply outputs the data to the screen.
Option B) print() - This option is incorrect because the print() function also does not assign the output to a variable. It only prints the data to the screen.
Option C) printf() - This option is incorrect because printf() is a function in C programming language, not in PHP. It is used to format and print data to the screen, but it does not assign the output to a variable in PHP.
Option D) sprintf() - This option is correct because the sprintf() function in PHP can assign the formatted output to a string variable. It allows you to format data and store it in a string variable for further use.
The correct answer is Option D) sprintf(). This option is correct because it assigns the output to a string variable.
Note: It is important to mention that the correct answer may vary depending on the programming language you are using. In this case, the correct answer is for PHP.