Final answer:
The correct format specifier to display the value of the number variable formatted as '1,234,567.46' is %.2lf.
Step-by-step explanation:
The correct format specifier to display the value of the number variable formatted as '1,234,567.46' is %.2lf. This format specifier is used to display a double value with two decimal places.
Using this format specifier, the correct printf statement would be:
printf("%.2lf", number);