You are given a paragraph, a question and some answer options (associated with "A", "B", "C", "D", etc.) You need to list all the correct answer options with their associated letters (e.g. "A" can be a valid answer). Note that sometimes, more than one option can answer the question correctly and completely. In those cases, please generate all such options separated by a comma (e.g. "A, B" is a valid answer). Do not generate anything else apart from one or more of the following characters: 'A', 'B, 'C', 'D', etc.

Ex Input:
Paragraph- Sent 1: Howland talked but little on their way back to camp.
Sent 2: The scene that he had just witnessed affected him strangely; it stirred once more within him all of his old ambition, all of his old enthusiasm, and yet neither found voice in words.
Sent 3: He was glad when the dinner was over at Thorne's, and with the going of the mail sledge and the senior engineer there came over him a still deeper sense of joy.
Sent 4: Now _he_ was in charge, it was _his_ road from that hour on.
Sent 5: He crushed MacDonald's hand in a grip that meant more than words when they parted.
Sent 6: In his own cabin he threw off his coat and hat, lighted his pipe, and tried to realize just what this all meant for him.
Sent 7: He was in charge--in charge of the greatest railroad building job on earth--_he_, Jack Howland, who less than twenty years ago was a barefooted, half-starved urchin peddling papers in the streets where he was now famous!
Sent 8: And now what was this black thing that had come up to threaten his chances just as he had about won his great fight?
Sent 9: He clenched his hands as he thought again of what had already happened--the cowardly attempt on his life, the warnings, and his blood boiled to fever heat.
Sent 10: That night--after he had seen Meleese--he would know what to do.
Sent 11: But he would not be driven away, as Gregson and Thorne had been driven.
Sent 12: He was determined on that.
Question: How did Jack feel after dinner and why did he feel this way? (A) Jack was glad because he was in charge of the railroad building job (B) Happy because he was made in charge of the railroad (C) Sense of fear, because he was not use to being in charge (D) Jack was sorry to be replacing Thorne (E) Sense of joy, because the road was his from that hour on (F) Jack was unhappy because he lost his job (G) Jack felt enthusiastic about meeting people at dinner.

Ex Output:
A, B, E.

Ex Input:
Paragraph- Sent 1: Static electricity is like a teeter-totter.
Sent 2: What happens if a teeter-totter is balanced?
Sent 3: Correct!
Sent 4: It does not move.
Sent 5: What about when its not balanced?
Sent 6: Yes, it will now begin to move.
Sent 7: Charges move when they are not balanced.
Sent 8: Charges can build up by friction.
Sent 9: Maybe you rub your feet on a wool mat or carpet.
Sent 10: Rubber soled shoes readily gain charges.
Sent 11: The wool carpet easily gives up charges.
Sent 12: The two items become unbalanced.
Sent 13: One item has a positive charge.
Sent 14: The other has a negative charge.
Sent 15: The difference in charge is called static electricity.
Sent 16: Just like the teeter-totter, something is going to move.
Sent 17: Positive charges build up on the mat.
Sent 18: Negative charges build up on you.
Question: What happens if static electricity is not balanced? (A) There would be a positve or negative charge (B) There is a neutral charge (C) There is a bad charge (D) It sits still (E) It moves and increase its charge (F) Charges move, building up friction (G) It moves causing a charge (H) It does not move (I) There is a good charge (J) There is a positive charge for sure.

Ex Output:
A, E, F, G.

Ex Input:
Paragraph- Sent 1: As Philip marched south, his opponents blocked him near Chaeronea, Boeotia.
Sent 2: During the ensuing Battle of Chaeronea, Philip commanded the right wing and Alexander the left, accompanied by a group of Philip's trusted generals.
Sent 3: According to the ancient sources, the two sides fought bitterly for some time.
Sent 4: Philip deliberately commanded his troops to retreat, counting on the untested Athenian hoplites to follow, thus breaking their line.
Sent 5: Alexander was the first to break the Theban lines, followed by Philip's generals.
Sent 6: Having damaged the enemy's cohesion, Philip ordered his troops to press forward and quickly routed them.
Sent 7: With the Athenians lost, the Thebans were surrounded.
Sent 8: Left to fight alone, they were defeated.
Sent 9: After the victory at Chaeronea, Philip and Alexander marched unopposed into the Peloponnese, welcomed by all cities; however, when they reached Sparta, they were refused, but did not resort to war.
Sent 10: At Corinth, Philip established a "Hellenic Alliance" (modeled on the old anti-Persian alliance of the Greco-Persian Wars), which included most Greek city-states except Sparta.
Sent 11: Philip was then named Hegemon (often translated as "Supreme Commander") of this league (known by modern scholars as the League of Corinth), and announced his plans to attack the Persian Empire.
Question: Why was Sparta not part of the "Hellenic Alliance"? (A) It did not welcome Philip (B) They did not love in Hellen (C) They were not invited.

Ex Output:
A.