Answer:
D). Be Succinct.
Step-by-step explanation:
An acceptance speech is elucidated as the speech that is delivered at the time of receiving an award or honor and aims to thank the people who've been the part or contributing element of that prize or honor.
As per the question, option D displays that all the given points must be included in an acceptance speech while receiving an award except for 'being succinct' as this would leave a negative impression of the speaker(as 'of being in attitude and thankless') before the audience. Thus, the acceptance speech must include subjective details that aim to thank the audience and convince the audience emotionally that 'you are the most deserving candidate to receive that award or honor' and 'naming someone more deserving would help leave a positive image on the audience. Therefore, option D is the correct answer.