The "Interdisciplinary Influence" on the Study of Consumer Behaviour Refers

The "interdisciplinary influence" on the study of consumer behaviour refers to:

A) the wide range of different professional and academic fields doing consumer research
B) the increasing need to acknowledge differences in other cultures when marketing products
C) setting a deliberate policy of hiring consumer research professionals who are from other countries
D) the need for establishing rigorous discipline when conducting consumer research
E) the variety of organizations sponsoring consumer research, such as universities, advertising agencies, governments, and manufacturers