What does frowned at the children mean?

It may be reasonably inferred from the passage that sylvia’s attitude toward mistress molly’s antics is ?

Match the vocabulary word with its meaning. 1. capitalism to change or improve something by correcting faults or removing abuses 2. chattel an economic system based on private ownership and competition motivated by profit 3. imperialism policy extending political, economic, or military rule over another 4. indentured an economic system where colonies supply goods to the mother country 5. mercantilism an agreement committing one person to be another's slave for a certain period of time 6. reform a type of slavery where the slave is the sole property of the master with no rights

Why is the sons of liberty a difficult group to describe ?