When antibiotics were first developed, most infectious diseases could be controlled by them. today certain bacteria are resistant to many antibiotics. one possible explanation for this change is what?

Through mutations in the DNA of bacteria, they can adapt. Only the mutated bacteria would live and keep producing bacteria with the same mutation. Eventually, they would be immune to antibiotics.

I’m going to guess these are the choices: a) recreational skiing developed in the mid-19th century b) it was originally invented as a way of getting from place to place in snowy regions c) downhill skiing is currently the only common form of the sport d) it mostly evolved from snowshoeing- if that’s the cases then the answer would be c) downhill skiing is currently the only common form of the sport