Available choices:
[a]. Material carrying electricity;
[b]. decomposing dead organisms;
[c]. DNA damage and mutations;
[d]. soil loss through hurricanes;
[e]. Something that smells like rotten eggs;
[f]. extreme heat and pressure;
[g]. chemical compound NaCl;
[h]. generating heat by burning;
Q: Fact 1: The emission of sulfur dioxide causes acid rain. Fact 2: Sulfur Dioxide and Asthmatics A highly reactive colorless gas smelling like rotten eggs, sulfur dioxide derives primarily from fossil fuel combustion. Given the two facts above, the emission of what causes acid rain?
A:
[e].