The wide use of antibiotics has presented a number of problems. Some patients become allergic to the drugs, so that they cannot be used when they are needed. In other cases, after prolonged treatment with antibiotics, certain organisms no longer respond to them. This is one of the reasons for the constant search for more potent drugs.From the information provided above, it can be validly concluded that

Directions: For each question, a paragraph will be given that contains all the information necessary to infer the correct answer. Use only the information provided in the paragraph. Do not speculate or make assumptions that go beyond this information. Also, assume that all information given in the paragraph is true, even if it conflicts with some fact known to you. Only one correct answer can be validly inferred from the information contained in the paragraph.