Question

which of the following would make experimental results more reliable?
a. choosing the data that match the hypothesis
b. adding the experimenters opinion to the conclusions
c. performing the experiment multiple times
d. increasing the number of variables in the experiment

Explanation:

Repeating an experiment multiple times helps to account for random errors and variability, increasing the reliability of results. Choosing data to match a hypothesis is bias - not reliable. Adding an experimenter's opinion is subjective and not scientific. Increasing the number of variables without proper control can complicate and reduce reliability.

Answer:

C. performing the experiment multiple times