Which sentence is in the active voice?

The pact was negotiated by a team of seasoned diplomats.
The garden was colonized by a dazzling variety of weeds.
Our teacher was quoted in a magazine last week.
Our old toaster always burns the toast on one side.Which sentence is in the active voice?

The pact was negotiated by a team of seasoned diplomats.
The garden was colonized by a dazzling variety of weeds.
Our teacher was quoted in a magazine last week.
Our old toaster always burns the toast on one side.