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 Q]: Paragraph- Sent 1: Sometimes a full Moon moves through Earths shadow.
Sent 2: This is a lunar eclipse .
Sent 3: During a total lunar eclipse, the Moon travels completely in Earths umbra.
Sent 4: During a partial lunar eclipse, only a portion of the Moon enters Earths umbra.
Sent 5: When the Moon passes through Earths penumbra, it is a penumbral eclipse.
Sent 6: Since Earths shadow is large, a lunar eclipse lasts for hours.
Sent 7: Anyone with a view of the Moon can see a lunar eclipse.
Sent 8: So unlike a solar eclipse, it doesnt get dark on Earth.
Sent 9: Instead it gets dark on the Moon.
Sent 10: Partial lunar eclipses occur at least twice a year, but total lunar eclipses are less common.
Sent 11: The Moon glows with a dull red coloring during a total lunar eclipse.
Question: Is it more common for the Moon to travel completely in the Earth's umbra or only partially? (A) Partial lunar eclipses occur at least twice a year, but total lunar eclipses are less common (B) Partially (C) A total eclipse is less common than partial so it is more common for the moon to travel partially in Earth's umbra (D) Completely.
[EX A]: B, C.

[EX Q]: Paragraph- Sent 1: Einstein was displeased with quantum theory and mechanics (the very theory he helped create), despite its acceptance by other physicists, stating that God "is not playing at dice."Sent 2: Einstein continued to maintain his disbelief in the theory, and attempted unsuccessfully to disprove it until he died at the age of 76.
Sent 3: In 1917, at the height of his work on relativity, Einstein published an article in Physikalische Zeitschrift that proposed the possibility of stimulated emission, the physical process that makes possible the maser and the laser.
Sent 4: This article showed that the statistics of absorption and emission of light would only be consistent with Planck's distribution law if the emission of light into a mode with n photons would be enhanced statistically compared to the emission of light into an empty mode.
Sent 5: This paper was enormously influential in the later development of quantum mechanics, because it was the first paper to show that the statistics of atomic transitions had simple laws.
Sent 6: Einstein discovered Louis de Broglie's work, and supported his ideas, which were received skeptically at first.
Sent 7: In another major paper from this era, Einstein gave a wave equation for de Broglie waves, which Einstein suggested was the Hamilton-Jacobi equation of mechanics.
Sent 8: This paper would inspire Schrodinger's work of 1926.
Question: After discovering Louis de Broglie's work, what did Einstein give for de Broglie waves? (A) Hamilton-Jacobi equation (B) A wave equation.
[EX A]: B.

[EX Q]: Paragraph- Sent 1: Speed is an important aspect of motion.
Sent 2: It is a measure of how fast or slow something moves.
Sent 3: To determine speed you must know two things.
Sent 4: First, you must know how far something travels.
Sent 5: Second, you need to know how long it takes to travel that far.
Sent 6: Speed can be calculated using this formula: speed = distance time A familiar example is the speed of a car.
Sent 7: In the U.S., this is usually expressed in miles per hour.
Sent 8: Think about a trip you and your family made in the car.
Sent 9: Maybe the trip covered 120 miles and it took 3 hours.
Sent 10: What was the cars speed?
Sent 11: speed = 120 mi = 40 mi/h 3h The speed of a car may also be expressed in kilometers per hour (km/h).
Sent 12: The SI unit for speed is meters per second (m/s).
Sent 13: This is the unit of measure a scientist would use.
Question: What is the unit for speed and who uses it? (A) Ohms - Scientists (B) The SI unit is meters per second (m/s). Used by scientists (C) KPH - US (D) Frequency - Kinetic Engineers (E) H is used by the US (F) Scientist use m (G) US use mi (H) km (I) SI- scientists (J) S.
[EX A]:
B.