Which of the following describe supervision activity?

Julie, a marketing manager at TTY Tools, continually watches for changes in the business environment and monitor business indicators such as economic indicators and business cycles.

As a manager at CBA Rides, Mason's primary responsibility is to bring together the work of others both inside his work unit and out.

As a production manager, Jason evaluates and takes corrective action concerning the allocation and use of human, financial, and material resources at SBA Systems, Inc.

As the consumer division head of JNJ Systems, Riya continually oversees the work of her subordinates.