Inclusive unionism is practiced mostly by:

A) professional and semiprofessional employees.
B) small unions comprised of skilled workers,such as the bricklayers.
C) industrial unions.
D) craft unions.

Inclusive unionism is a strategy that aims to organize workers of all skill levels in a particular industry or sector, rather than only those in a specific craft or profession. This approach is most commonly practiced by industrial unions, which represent workers in a wide range of job classifications and industries. Professional and semiprofessional employees may also be represented by industrial unions, but there is no evidence to suggest that inclusive unionism is practiced mostly by this group. Craft unions, by definition, represent workers in specific skilled trades, so they would not typically embrace an inclusive unionism strategy.