Answer:
The correct answer is - option A) Some bacteria with resistance to antibiotic C were selected for overtime.
Step-by-step explanation:
In the given question it is stated that the bacteria number initially declines when they are treated with antibiotic C but then started to increase as time passes on. It is clear with the given data that initially the number of bacteria declines due to bacteria does not resistant to antibiotic C but after some time some bacteria developed resistance to the antibiotic and were selected and increased overtime.
The correct answer is - option A