In order to test the program, the programmer initializes numList to $0,1,4,5.$ The program displays $10,$ and the programmer concludes that the program works as intended.

Which of the following is true?

$($A$)$ The conclusion is correct; the program works as intended.

$($B$)$ The conclusion is incorrect; the program does not display the correct value for the test case $0,1,4,5.$

$($C$)$ The conclusion is incorrect; using the test case $0,1,4,5$ is not sufficient to conclude the program is correct.

$($D$)$ The conclusion is incorrect; using the test case $0,1,4,5$ only confirms that the program works for lists in increasing order.