Which of the Following Electronic Transitions Is Common in the UV

Which of the following electronic transitions is common in the UV spectrum of 1,3-butadiene?

A) " $\sigma$ $\to$ $\pi$ "
B) " $\sigma$ $\to$ $\pi$ *"
C) "n $\to$ $\pi$ *"
D) " $\pi$ $\to$ $\pi$ *"