Answer:
I think the best answer is b.
its the third option, it describes it very accurately.
Answer:
between-subjects design
Explanation:
According to my research on different experimental designs, I can say that based on the information provided within the question the best way to make sure that the internal validity will not be influenced by an outside event is to switch to a between-subjects design. This type of design is an experiment design that has two or more groups of subjects each being tested by a different testing factor simultaneously. Since they are done simultaneously it significantly reduces outside influence.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
<span>This statement is False. Because avoiding vaccination will raise the risk of getting flu. Vaccination helps your immune system to develop adaptive immunity to infections. to cut down the risk of any infection it's better to vaccinate. So given statement is False. It will be true if instead of the word avoiding,there will be getting. </span>
