Respuesta :
After reading the questions and options concerning punctuation, we can answer in the following manner?
16. A. If the adverb clause comes at the beginning of the sentence, set off the clause with a comma.
17. B. True
18. B. If the clause provides unnecessary description for the reader to understand the sentence.
19. E. All the options are correct.
Punctuation rules:
- We always need a comma after an adverb clause if the clause comes at the beginning of a sentence. Example: Unless you are very hungry, we should wait to eat with them.
- It is true that we should never use a comma before a clause beginning with "that". It is possible, however, to substitute it for "which", and then use a comma. For example: The bag that was found by the guard is mine. VS The bag, which was found by the guard, is mine.
- We use commas to set off an adjective clause when the information it provides is not essential for the meaning of the sentence. The example above applies here: The bag, which was found by the guard, is mine.
- All sentences in question 19 are punctuated correctly, and they follow the rules discussed above.
Learn more about punctuation here:
https://brainly.com/question/25880059