Mahkai has an MBA and is being recruited by an investment banking firm as a sales representative. He has had $10$ years of experience in selling industrial supplies. He was quite successful in this job but is worried that selling investment strategies may be more difficult. What factor would be the major reason for this worry?

Services are intangible and, therefore, different from his previous experience.

The marketing program of investment strategies is inconsistent.

Investment strategies are an example of services that exhibit credence qualities.

His services and the products he sells are inseparable.