Answer:
Clarity
Clarity is an essential feature of a good speech. A speech should be clear and unambiguous so that the audience can understand it easily. If it is not clear enough to express its meaning to the audience, it will become ineffective.
Definiteness of Message
The message of the speech should be definite and relevant to the subject matter.
Conciseness
The audience becomes impatient with a long speech. Hence, speech should be as concise as possible. However, it should not incomplete.
Interesting
A speech should be delivered in an interesting and pleasing way so that the audience is motivated to pay attention. In order to make the speech interesting, various stories, examples, quotations, and jokes can be cited.
Informal Touch
Though speech is a formal address, it should be presented in a personal and informal way.
Considering the Audience
Speech is delivered to a specific audience. So the speaker should actively consider the expectations, interest, and nature of the audience.
Speaking Slowly
An ideal speech is one that is delivered slowly and in the usual tone. It helps the audience to hear and understand the message clearly.
Free from Emotions
Another important feature of a good speech is that it should be delivered in an unbiased and unemotional way. Speaker’s emotion may drive him away from the main theme.
Use of Body Language
Good Speech goes with necessary body language. Therefore, at the time of delivering a speech, the speaker should use various nonverbal cues.
Ensuring Participation of Audience
A good speech is one that ensures the participation of the audience with the speaker. That means the audience will ensure their attention through effective listening, expressing their solidarity with the speech and so on.
So altogether I think it should be b,c,d