_____ primarily measures a person's experience when interacting with a product.

A) Usability testing
B) Simple random sampling
C) Stratified random sampling
D) Systematic sampling
E) Metasearch tool

Usability testing is specifically designed to measure the user experience when interacting with a product, such as a website or app. The goal is to identify any usability issues or challenges that may negatively impact the user's experience. Simple random sampling, stratified random sampling, and systematic sampling are all statistical techniques used to gather data from a population, but they do not specifically measure user experience. Metasearch tools are search engines that compile results from multiple search engines, which is also not related to measuring user experience.