Answer: c. split ticket
Step-by-step explanation:
A Split ticket type of voting is used to describe a scenario where a person votes for different candidates from different political parties. Indeed this is where the term gets its name, split meaning that the votes are split between parties.
For instance, voting Republican for President, Democrat for Senator and then Republican for House of Representative.
This is usually done because the voter believes in the individual rather than the party and this is what happened in the scenario described.