A compound sentence needs at least two independent clauses and can be combined by conjunctions such as and, or, but, for, yet, nor and so. The independent clauses can also be combined by a semicolon ;
(A)
If we look at A, we can see A does not have two independent clauses. There is a depend and an independent clause and that is why we have a comma after go in A.
(B)
What I said about A is the same for B
(C)
Ah! good old C. C has two independent clauses and has the conjunction and after mall and before John. This is very important because this is where one independent clause stops and another independent clause starts. C has everything that makes up a compound sentence so the answer is C.
(D)
If we look at D, we can see D is just a single independent clause, which is asking a question.
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At the conclusion of The Mark of Athena, Annabeth and Percy tumble into a pit leading straight to the Underworld. The other five demigods have to put aside their grief and follow Percy’s instructions to find the mortal side of the Doors of Death. If they can fight their way through the Gaea’s forces, and Percy and Annabeth can survive the House of Hades, then the Seven will be able to seal the Doors both sides and prevent the giants from raising Gaea. But, Leo wonders, if the Doors are sealed, how will Percy and Annabeth be able to escape?
They have no choice. If the demigods don’t succeed, Gaea’s armies will never die. They have no time. In about a month, the Romans will march on Camp Half-Blood. The stakes are higher than ever in this adventure that dives into the depths of Tartarus.
Answer:
Kennedy appeals to the audience's curiosity with his claim that the exploration of space is an adventure. Kennedy appeals to the audience's competitive spirit with his claim that the exploration of space will go on with or without the United States.
There is no capitalization in any of those sentences
-freddy goes with capital F
-James same