This circle graph shows the results of a survey that asked people to identify their favorite type of music.

what percent of people chose rock or country as their favorite type of music?

9%

35%

45%

55%

According to the graph. 18% chose country and 27% chose rock. Because there is more than one option it increases probability. Plus, "or" can mean total so simply add 18% and 27%. 18 plus 27 equals 45.
C. 45
45% of people chose country or rock music