Scientists sequenced a number of antibiotic-resistance genes…

Scientists sequenced a number of antibiotic-resistance genes in soil samples. Five genes presented a 100% sequence match with antibiotic resistance genes in bacteria isolated from a clinical setting. Which of the following answers provides the best explanation for the observed results? 

Scientists sequenced a number of antibiotic-resistance genes…

Scientists sequenced a number of antibiotic-resistance genes in soil samples. Five genes presented a 100% sequence match with antibiotic resistance genes in bacteria isolated from a clinical setting. Which of the following answers provides the best explanation for the observed results?