The answer, in my opinion, is the second sentence, "The coach who is an expert in the sport explained the revised rules to us". Here, the "Who is an expert", is presumably the nonessential clause.
Answer:
The best effective thesis statements are both the first ("Hollembeak's review of the high school's play is fun and entertaining to read") and third ("In her editorial, Mellie writes convincingly of the need for high school classes to begin later in the morning") options.
Explanation:
The first and third statements are the only ones which state a convincing thesis about an argument. Both of them are informative about what is the object argued and present a clear idea of the main point made on that. Second option does not apply to the question because it is lacking in some way, because though it is informative and sets an idea of the argument, it is very broad to state "the play's action [is] in the 21st century". Fourth option does apply to the question as well because it is not a thesis, that is just exploring the content of an argument made, clarifying ideas for readers. And fifth option does not apply to the question too, because it is not a thesis, that is just a description of an information previously given, it only characterizes an informative statement, not an effective thesis.
Most speeches tend to last somewhere around 2-3 minutes so I would go with B. Traveling to Europe, meaning you have extensive knowledge and that leads to more things to talk about and explain
a thesaurus is a book of synonyms, antonyms and related words
