Here are the answers to your questions:
Question 1
A) Which of the following describes what synonyms must have in common?
Answer: They must be the same part of speech.
Question 2
A) Antonyms are words that
Answer: mean opposite things.
Question 3
A) Which choice best explains what context clues help readers do?
Answer: understand unfamiliar words.
Question 4
A) Which of the following does a reader gain by understanding the relationship between words?
Answer: a better understanding of the words' meanings.
Question 5
A) Which of the following would be an antonym for the word “kind”?
Answer: It would mean unkind.