Can you give more detail, so I can help you?:))
16. A
17. C
18. B
19. D
20. A
21. D
22. D
There is not enough information please give more
<span>The 1st comma rule:
</span>Use commas to separate words
and word groups in a simple series of 3 or more times
The 2nd comma rule:
Use a comma to separate independent clauses when they are joined by the following conjunctions: and, or, for, nor, so, but, and yet.
The 3rd comma rule:
Use a comma to separate a dependent clause from an independent clause.
The 4th comma rule:
Use a comma to separate any word or phrase from the rest of the sentence that is not essential to the rest of the sentence
The 5th comma rule:
Use a comma to separate a quotation from the rest of the sentence.
The 6th comma rule:
Use a comma to separate an introductory element from the rest of the sentence.
The 7th comma rule:
Use a comma to separate the name of a city from a country or state
The 8th comma rule:
<span>Use a comma to separate the day of the week, the day of the month, and the year</span>
Answer:
In California's Yosemite National Park, the summit of the iconic El Capitan rock formation looms 3,000 feet above its base. Though El Capitan's vertical granite has always presented a challenge for climbers, its southeastern face, known as the Dawn Wall, is thought to be the most punishing.