Data must be considered valid for scientists to trust conclusions. which is the best way to increase the validity of data in an experiment? get many scientists' opinions of the data. measure data in si units. carry out two or fewer trials. record only the most significant observations.

Carry out two or fewer trials.

Data’s conclusion is considered valid if the experiment validity is being controlled. With this conclusion validity, our data gathered and presented are considered a reasonable one. It is the most important types of validity. As what is said, by having conclusion validity, your data will be undoubtedly least considered since it is labelled as statistical and well-studied. Once you already mention the word statistics meaning it is studied and surveyed with the most of the human race and includes relationship in your data.

Covalent bond is the correct answer