Which of these tests, when used in a job interview, would involve testing a candidate's reading, comprehension, mathematics, problem solving, and decision-making skills?

A) Key skills test
B) Job skills test
C) Cognitive test
D) Aptitude test

A cognitive test is designed to evaluate a candidate's thinking abilities, such as reading, comprehension, mathematics, problem solving, and decision-making skills. This type of test assesses general intelligence and helps employers determine if a candidate has the mental agility required to perform job duties effectively. Key skills test and job skills test are more focused on specific skills required for the job, while an aptitude test measures a person's ability to learn new skills.