A developmental scientist will likely use a.deductive reasoning

A developmental scientist will likely use deductive reasoning b. inductive reasoning c. both a. and b. d. neither a. nor b.

Why do scientists use deductive reasoning?
Deductive reasoning is a form of logical thinking that uses a general principle or law to forecast specific results. From those general principles, a scientist can extrapolate and predict the specific results that would be valid as long as the general principles are valid.
What is deductive reasoning and inductive reasoning?
Deductive reasoning, or deduction, is making an inference based on widely-accepted facts or premises. If a beverage is defined as “drinkable through a straw,” one could use deduction to determine whether soup is a beverage. Inductive reasoning, or induction, is making an inference based on observation, often of a sample.