Answer:
C. Farm A is a grass-fed pasture for beef production, whereas Farm B is a traditional concentrated animal feedlot for cattle.
Explanation:
Antibiotic usage only when animals are ill is common for a grass-fed, pasture-style farm but not in a traditional concentrated animal feedlot where animals are proactively given antibiotics to prevent the spread of illness in crowded conditions. Also, the waste could be reused on-site as fertilizer if there are fewer animals (which is more likely in a grass-fed, pasture-style farm rather than in a feedlot).
