Answer:
It is easier to reach a conclusion of causation from an experimental study than from an observational study because an experimental study is backed by evidence whereas an observational study is speculative.
Explanation:
An observational study is based on what appears to the eyes whereas an experimental study has facts and logical proof to connect the hypotheses to the conclusion. Before conclusions are reached in experimental studies, tests are conducted and stakeholders who are representative of the population are surveyed to obtain accurate data that can be further analyzed.
Observational studies are simply speculative and based on guesswork that cannot be relied upon.
To War. In its declaration of secession, Texas stated that it intended to go to war to ... The two highest- ranking Texans in the Confederate army were Albert Sidney ...
The answer to your question would be A
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Only once ventilation has been achieved is the firefighters attempt to enter a structure when backdraft conditions are present.
<h3>What is the meant by ventilation?</h3>
In the workplace, ventilation is used to reduce exposure to airborne contaminants. It is widely employed to purge the air of contaminants like fumes, dust, and vapours in order to produce a secure and healthful working environment.
The alveoli are responsible for converting carbon dioxide from the atmosphere into oxygen.
Thus, Only once ventilation has been achieved is the firefighters attempt to enter a structure.
For more details about ventilation, click here:
brainly.com/question/11471552
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