I believe the best style of leadership here would be democratic.
All of them should decide by vote who they want their leader to be, which is what happens in democracy. Given that they all need to work together, it's best for them to decide together on the book, specific projects, and the division of their work, and the best option for them would be a democracy.
Authoritarian style would mean the leader will impose on them whatever he or she wants; laissez-faire would mean they 'employees' decide without really taking into account their leader, which shouldn't be done in this case.
We need to see the answers and the actual question
Amy Tan's A Mother's Tongue The purpose of Amy Tan's essay, “Mother Tongue,” is to show how challenging it can be if an individual is raised by a parent who speaks “limited English” (36) as Tan's mother does, partially because it can result in people being judged poorly by others.