Which of the following is a key characteristic of the 'already and not yet' eschatology present in the New Testament?

A The complete fulfillment of God's kingdom will occur only after the final judgment. B Believers experience partial aspects of God's kingdom in the present, while awaiting its full realization in the future. C The kingdom of God was fully realized at Pentecost, leaving no future expectation. D The 'already and not yet' refers solely to the individual believer's experience of salvation.