Final answer:
Zaynab is using the research skill of analysis as she evaluates the reliability of information on a company's website by considering potential biases and using critical thinking. Option C is the correct answer.
Step-by-step explanation:
Zaynab is engaging in the research skill of analysis as she questions the validity of information found on a company website. Analysis in the research process involves collecting data, setting criteria, and applying these criteria to judge the quality of the data, such as identifying potential biases.
Critical thinking forms a core part of this skill, as it requires evaluating evidence to form a judgment about the reliability and credibility of sources. Moreover, Zaynab's act of questioning the validity suggests a level of epistemic humility, understanding the limitations and potential biases inherent in various sources.
Based on the information provided and the options available, the correct option for the research skill Zaynab is using is C. analysis.