A product manager is eager to develop a new product idea. To gain approval to do so$,$ the product manager orders the research team to survey a small group of customers that have been briefed on the product concept already and who reacted favorably to it$.$ This type of research is known as:

A product manager is eager to develop a new product idea. To gain approval to do so$,$ the product manager orders the research team to survey a small group of customers that have been briefed on the product concept already and who reacted favorably to it$.$ This type of research is known as:

Product research.

Sugging.

Focus group research.

Advocacy research.