the answer could not be D because a Golgi Apparatus is a tiny structure, or organelle, in a cell that "packages" nutrients for use inside the cell. The answer could not be c. because a nucleus is a tiny structure, or organelle, in a cell that "packages" nutrients for use inside the cell. The answer could not be Endoplasmic Reticulum because that is where proteins are transported from one part to the other. So the only answer left is Mitochondria, because the Mitochondriamain function is to produce ATP, the energy currency of the cell.
Answer:
Downpayment: 15% of original price
Original price: $120,000
15% of 120,000 = 
× 120,000
= $18,000
Thus, the downpayment is $18,000.
I think its B. It sounds familiar
Polymerase, nucleotides, complementary
Hope that helped :)
