Answer:
The fungus is resistant to the antibiotic
The antibiotics did not work because antibiotics do not kill fungal infections.
Step-by-step explanation:
According to this question, an antibiotic is a substance/medicine that combats bacterial-caused infections or diseases. In this case, an antibiotic A was used against a fungus that caused athlete's foot, however, there was no effective result recorded.
The fungi in this case can be said to be "RESISTANT" to the antibiotic used because antibiotics are specific to bacterial infections not fungal infections. Antibiotics only kill bacteria not fungi, hence, the antibiotic A used will have no effect whatsoever on the fungus causing the athlete's foot infection.