Answer: b. dependable people are better performers than those less dependable.
Step-by-step explanation:
There´s research that proves that dependable people are better performers than those less dependable. For example, Research developed by psychologists Paul R. Sackett and Philip T. Walmsley of the University of Minnesota shows that conscientiousness, which includes being dependable is the most highly sought-after personality trait for job applicants as an indicator of good job performance.
Option a. is incorrect because people being extraverted or introverted doesn´t mean they´ll have a better performance or not, because it depends on the task they have to do and how useful one personality type or the other might be more suitable. Option c. is incorrect because there is indeed a documented relationship between reliability and job performance. Option d. is incorrect because there´s no indication that achievement-oriented people often fall short in their performance.