Question

a scientist conducted one trial of an experiment and got unexpected results. how can the scientist increase confidence in the results?
by repeating the experiment several times
by changing the experimental procedure
by asking other scientists what they think about the results
by modifying the results so they are close to the expected results

Explanation:

• Repeating the experiment several times helps verify if the results are consistent. Changing the procedure would introduce new variables, asking others for opinions doesn't validate the result's accuracy, and modifying results is unethical and unscientific. So repeating the experiment is the correct approach.

Answer:

A. by repeating the experiment several times