Which of the following statements is true concerning data selection? a good data selection strategy can eliminate the need for data collection. establishing a data selection strategy prior to collecting data decreases the chance of a biased outcome. a data selection strategy is required by federal law. a data selection strategy must be established after the data are collected.

Establishing a data selection strategy prior to collecting data decreases the chance of a biased outcome

Explanation:  

Data selection is the process of defining data types and sources that are suitable for data collection.

This strategy is one of the main parts of researching and it should be organized and planned for minimizing the bias. Something that comes before data collection is data selection so the collection must be well prepared.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.