20. Effective communication includes:info_outlineSelect all that applyAExpressing your ideas clearly and conciselyBActive listeningCSpeaking loud and clear

To answer the question regarding effective communication, let's analyze each option provided:

1. Expressing your ideas clearly and concisely: This is fundamental to effective communication. Clarity and conciseness help ensure that the message is easily understood by the audience.

2. Active listening: Effective communication is not just about expressing oneself; it also involves listening attentively to others. Active listening facilitates understanding and engagement in conversations.

3. Speaking loud and clear: While speaking loudly can be important in ensuring that the message is heard, effective communication is more about the clarity and quality of the speech rather than volume alone.

Conclusion

The correct options are:

• A: Expressing your ideas clearly and concisely
• B: Active listening

Thus, the answers that apply to effective communication are A and B.