Answer:
The correct option is B) swing voter
Step-by-step explanation:
A swing voter is also known as a floating voter. A swing voter can be described as a voter who is not affiliated with any particular political party. Such kind of voter votes across party lines. Hence, option B is correct.
Other options, like option D, is not correct because valence voting can be described as a type of voting where people tend to vote for a common preference.