A nurse is assessing a client who is in active labor and notes that the presenting part is at 0 station. Which of the following is the correct interpretation of this clinical finding?

The posterior fontanel is palpable.

The fetal head is in the left occiput posterior position.

The lowermost portion of the fetus is at the level of the ischial spines.

The largest fetal diameter has passed through the pelvic outlet.