You are testing a dictionary lookup mobile application.

The correct answer isC.The user should be able to change the font size on the screen.

The user should be able to change the font size on the screen

This is a test condition that can be used to verify the usability quality characteristic because it tests the user-friendliness and customizability of the application. It verifies that the user can adjust the font size according to their preference and readability, which can enhance the user experience and satisfaction.It also reflects the learnability and operability sub-characteristics of usability, as the user should be able to easily find and use the font size option1.

References=

ISTQB Certified Tester Advanced Level Syllabus Test Analyst2, Section 3.2.2 Usability

ISTQB Test Analyst Syllabus and Study Guide3, Section 3.2.2 Usability

How to Perform Usability Testing for Mobile Apps4, Section 3. Usability Testing Methods