Susan is hired as salesperson in a jewelry store. Being new to this industry, she does not possess a great deal of knowledge about the products offered by her store. She is often asked questions by customers to which she does not know the answer. However, she always responds to them by saying, "I will check with my store manager and get back to you." By being up-front with her customers, Susan exhibits:a. product knowledgeb. competitor knowledgec. predictabilityd. candore. expertise