All fossil fuel power types share this disadvantage:

a
they add carbon dioxide to the atmosphere, causing global warming
b
they add sulfur compounds to the atmosphere, causing acid rain
c
they do not work when the sun is not shining
d
they are more expensive than other energy sources

They add sulfur oxide to the atmosphere causing acidic rain.

Explanation:

At combustion , they release pollutants like sulfur and Nitrogen oxides to the atmosphere which contributes to the formation of acidic rain and smog among other negative consequences.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.