Explanation:

- Open Refusal to Obey Orders: This phrase describes someone who openly chooses not to follow commands or does not comply with instructions.

- Option 1: Defiance - This word perfectly captures the act of openly refusing to obey orders. It implies resistance and bold disobedience.

- Option 2: Compliance - This is the opposite of defiance. It means the act of following orders or adhering to rules.

- Option 3: Obedience - Similar to compliance, this means following orders or commands, not defying them.

- Option 4: Adherence - This means sticking to a rule, plan, or agreement, which is contrary to defying it.