Objective: To preheat the oven,

Which of the following solutions is more sound in terms of naive physics reasoning?

Available choices:
[+] turn the knob on the oven dashboard until the line is next to the desired temperature..
[+] turn the knob on the oven dashboard until the line is next to the word "Broil".
turn the knob on the oven dashboard until the line is next to the desired temperature.