Developing scientific knowledge
how can a scientist ensure that his or her data are reliable?
by making a single observation
by repeating trials during an experiment
by recording values without units
by keeping the results private

The correct answer option is B. by repeating trials during an experiment

Explanation:

We are to determine whether which one is an appropriate answer option for the method by which a scientist can ensure that his or her data are reliable.

Scientists repeat the experiments over and over and keep recording the values. Since an experiment cannot go wrong every time it is performed so they repeat trials to make sure that their data is reliable.

a)the court decides which cases it will hear

traditionally, roman society was rigid. by the first century. however, the need for capable men to run rome's vast empire was slowly eroding the social barriers. the social structure of ancient rome was based on heredity, property,wealth, citizenship and freedom.