An adverb is an adjective + a verb. Meaning, it's a word that describes what someone/something is doing during the action.
A (whistle) & C (referee) are both nouns - person, place, or thing.
D (red) is just an adjective - describing something
B would make the most sense, it's telling you what the referee does with his whistle.
Hope this helped!
Answer:
Today I thought about how to know if someone is being true to their word. I've realized you can never know anyone's true intentions and no matter what you choose, to believe them or not you will always have a little regret so just do what feels best to you.
Answer:
E) clarifies the reasons astronomy meets the standards for scientific rigor
Explanation:
According to the passage, for a subject matter to be defined as a science, it must be empirical, rational, general, and cumulative. Empirical entails being subject to test by observation.
That sentence, “although we do control the conditions of observation” functions as a transitional element in that it shows that even though the subject matter in astronomy cannot be fully controlled, the conditions of observation can be controlled. This way, astronomy meets the condition of being called a science albeit an experimental science.