Because Lucy becomes aware that all of the adults are watching her as she plays,she starts to act silly and make funny noises.Her behavior is called

A) the directionality problem.
B) causality.
C) random sampling.
D) reactivity.

Reactivity

The tendency of a person to alter their behavior or response due to the awareness of being observed or measured.

Directionality Problem

An issue that arises when it is unclear whether one variable causes changes in another or vice versa, complicating the interpretation of study results.

Random Sampling

Random sampling is a technique used in research to select a sample group from a larger population using random methods, ensuring that every individual has an equal chance of being chosen.