Final answer:
In C programming, numeric values are compared using the == operator, which returns true if the values are equal and false otherwise.
Step-by-step explanation:
In the C programming language, when you want to compare numeric values to check if they are equal or not, you typically use the == operator. This operator allows you to compare two expressions and returns true if they are equal and false otherwise.
Other options like .equals() or compareTo() are methods used in object-oriented languages like Java for comparing objects, not primitve data types like in C. And isEqualTo() is not a standard operator or method in C.
Therefore, the correct answer to the question "C allows the programmer to compare numeric values using which of the following?" is c) ==.