Which of the following is a run-on sentence? Its ice slab walls of thick stone lie dormant, awakening only to sing the organ’s echoing melodies that reached my apartment window on Sunday mornings.
The city center in the valley below holds a 13th century cathedral with piercing Gothic spires that stretch upwards toward the heavens.
From its towering position on a hill overlooking the valley, a castle fortress rests; this silent sentinel stands as a powerful reminder of the ancient kings and queens who ruled centuries past.
The melodies would blow through my window with the breeze their notes would bounce off the walls and ceiling.

Read the sentence. the great wave was inexpensive to purchase, costing only about the same as a double of noodles. since lots of copies could be printed and still look good, it made loads of money. which best revises this sentence to create a more formal style and tone? *the great wave was as cheap as buying a double of noodles. since lots of copies could be made and still look great, people started making piles of money. *the great wave was inexpensive to purchase, costing about the same as a double of noodles. since mass quantities could be produced and still look exquisite, it became highly profitable to sell. *the great wave cost next to nothing, practically the same as a double of noodles. since mass quantities could be produced and still look awesome, it became highly profitable to sell. *the great wave was inexpensive to purchase, similar to buying a double of noodles. since lots of copies could be made that still looked amazing, those who sold it made tons of money.