Which of the Following Should Be Followed While Using an Opener

Which of the following should be followed while using an opener?

A) Read out the opener from notes to seem more professional.
B) Avoid using startling statements as the first point of interaction.
C) Personalize it to the needs and interests of the audience.
D) Use humor directed against the audience to grab their attention.
E) Generalize it to be able to suit interests of any audience.