Answer:
When delivering a speech, the speaker should D) make eye contact with several friendly faces in the audience and speak to them.
I say a would be good choice
<span>Assuming that this is referring to the same list of options that was posted before with this question, <span>the correct response would be "Although he had had a bad day [so and so] put on a cheerful face and attended the party." </span></span>
In my judgements, leave it as it is. It sounds the best and most accurate.