Laissez-faire
a) are impervious toward workers and their motivations to work
b) encourage communication between group members and with the leader
c) give objective praise and criticism of workers

The answer is "Option a".

Explanation:

The leadership of laissez-faire, also known as delegative governance, is a form of governance, that enables members of the group workers to make judgments. Research teams have indicated that it is, in particular, the leading style, that drives group members to lower profitability, and other choices were wrong, which can be described as follows:

the above statement/question is (true);