Dr. Haynes finds that in her laboratory, bacterium X can be killed with antibiotic Y. However, Dr. Swensson does not observe this same result in her laboratory. What is the most plausible explanation for why this happened?

Dr Swensson procedures weren't same as Dr Haynes

Explanation:

Dr. Swensson didn't use the exact procedure Dr Haynes used, if he did, he would have obtained same result.

b) to encourage free trade

in this scenario it would be the consumer demand as most influential in making the decision. the band members need to figure out where and from whom they will make the most money, in other words who out of the two consumer groups - football fans or car drivers - will spend their money, who is more likely to contribute to their cause and buy what they are offering.