I didn't understand what you meant by "underlined words" because there aren't any underlined words, but here's the sentence rewritten:
Often, we are invited to the parties.
The answer is D. The repetition of such phrases could be decoded to reveal hidden messages.
Hard choosing from "A" to "D", but my best answer that I came up with is "D" or "4"
The word "Who's" is a plural and actual stands for "Who is" So if you put that in that sentence "Who is book about blue whales is this?" Or for "2" the word "Whomever's" doesn't make since in the sentence.. "Whomever's book about blue whales is this?" And the same with "3". But with "4" "Whose" It fits in that sentence.. "Whose book about blue whales is this?" It's best if you read the sentence out loud and see which word best fits in that sentence.
Answer:
According to one version of the story, Laius, king of Thebes, was warned by an oracle that his son would slay him. ... Continuing on his way, Oedipus found Thebes plagued by the Sphinx, who put a riddle to all passersby and destroyed those who could not answer. Oedipus solved the riddle, and the Sphinx killed herself.
Explanation: