The correct answer is (B) interval; intervening episode, period, or space; anything that fills time between events; pause between two actions or acts of a play, etc. Also, a short dramatic piece, particularly of a light character.

Interlude comes from Latin interludium (inter + ludium [play])

Examples of use:

• Short interludes of music were interspersed with listener call-ins.
• Two short musical interludes separated the three acts of the play.