Identify the incorrect statement about personal selling.

The marketing of industrial goods, especially of high$-$priced items, requires strong personal selling efforts.

In some cases, personal selling may be truly global.

Most personal selling is done by headquarters, with varying degrees of subsidiary involvement.

In cases in which personal selling constitutes the primary thrust of the corporate promotional effort and in which global customer groups can be identified, unified and goordinated sales practices may be called for.