Answer:
d. a union representative urging management to avoid a strike by raising wages
Step-by-step explanation:
The persuasive speaking includes some important elements, its principal objective is to convince the listener about an specific point of view. It may include three principal methods: pathos, ethos and logos.
In this case the Union representative is trying to persuade the management to rise salaries, he can be appealing to Logos strategy. Logos is to use logical arguments to convince the audience, they will be evaluating if the argument of the speaker makes sense.