Final answer:
Practicing self-defense requires confidence, assertiveness, and strong body language.
Step-by-step explanation:
Practicing self-defense involves several important components. Confidence plays a crucial role by helping individuals stay calm and make quick decisions during a threatening situation. Assertiveness is also essential as it allows individuals to clearly communicate their boundaries and defend themselves if necessary. Additionally, strong body language is important as it can deter potential attackers and signal that you are not an easy target. Therefore, the correct answer is D. all of the above.
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