What type of lawsuit is most appropriate for Kirenna, who was terminated after confronting her boss about gender discrimination?

Choosing a civil rights infringement lawsuit is appropriate for Kirenna's situation because this type of legal action is designed to address violations of rights protected under federal and state civil rights laws, including those related to discrimination based on gender. Given that her termination followed her confronting her boss about gender discrimination, it suggests she may have faced retaliation for asserting her rights in the workplace.

Civil rights laws, such as Title VII of the Civil Rights Act of 1964 in the United States, protect employees from discrimination based on sex, among other factors. If Kirenna's confrontation was perceived as a protected activity under these laws, and her termination was a direct result of this activity, the civil rights infringement lawsuit would serve as a means to seek legal remedies for the alleged discrimination and retaliation.

In this context, other types of lawsuits would not adequately address the specific issue of discrimination Kirenna is facing. Negligence lawsuits generally pertain to cases where harm results from a lack of reasonable care, while a contractual breach lawsuit deals with violations of employment agreements that would not necessarily encompass discrimination claims. Similarly, a defamation lawsuit would involve false statements damaging her reputation, which is not the main issue in this scenario. Thus, the civil rights infringement lawsuit is the most suitable option