Answer:
A.) The crescent moon was beautiful as its luminous glow lit the sky.
Explanation:
A is the best answer because it makes the most sense and it was written the simplest.
B is incorrect because it would need commas enclosing "as its luminous glow lit the sky" to make sense.
C is incorrect because it would need commas enclosing "as it lit the sky".
D is incorrect because it has too many unnecessary commas.
