D, “big sip” is the oxymoron
You are narrowing your topic. Since you already know your main idea, you must list specific details in relation to it. Then, you must choose one and elaborate on that one subject.
Answer:
reward-certificate of achievement
promotion-sense of accomplishment
Explanation:
I think that optimistic attitude doesn't go with anything.
please inform me if I am wrong somewhere
Leader. This is probably the word your looking for.
Hope this helps.
~Fluerie