One of the ways to convey competence to your audience while giving a presentation is to

One of the ways to convey competence to your audience while giving a presentation is to make sure you've reviewed the slides and presentation prior to going over the information.

Explanation: When you give your presentation to the audience, you want them to feel confident in the information you are presenting to them. If you are unsure if the topics you are discussing, you are likely not going to convey competence to your audience. Reviewing the information prior to giving the presentation will stop the presenter from reading information directly off the slide and instead, give a presentation.

for submitting your question to

the answer to your question is : c) a government agency or homeowner

due to his line of work, he is most likely employed by a government agency or homeowner due to the other choices not being logical haha.