Pasteur's work with bacteria and disease included work on chicken cholera. During his work, one culture of cholera-causing bacteria spoiled and failed to induce the disease in some chickens Pasteur was trying to infect. Pasteur used these healthy chickens again, this time infecting them with live, healthy bacteria. The chickens did not get sick. He discovered that the weakened bacteria had caused the chickens to become immune to cholera. Pasteur had discovered an idea we use today, to keep us from getting certain disease. He discovered the use of??

A) antibiotics.
B) pasteurization.
C) prescriptions.
D) vaccines.

D) Vaccines

Explanation:

injecting an organism with a weakened version of bacteria causes immunity

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.