Which of the following series of steps would work correctly in the Little Computer to add two numbers?

Which of the following series of steps would work correctly in the Little Computer to add two numbers?

$901$ Get first input

$310$ Store first input

$901$ Get second input

$110$ Add first input

$902$ Output

$000$ Halt

$--------------------$

$901$ Get first input

$310$ Store first input

$901$ Get second input

$311$ Store second input

$111$ Add second input

$902$ Output

$000$ Halt

$--------------------$

$901$ Get first input

$901$ Get second input

$101$ Add first

$902$ Output

$000$ Halt

$--------------------$

$901$ Get first input

$901$ Get second input

$310$ Store first input

$311$ Store second input

$511$ Load second input

$110$ Add first input

$902$ Output

$000$ Halt