C. Only Odysseus would know the secret about the bed.
Odysseus, Penelope and the maid are the only ones who know that the bed cannot be moved because it is built with an olive tree trunk.
This is an example of a cause and effect relationship.
One of the essential characteristics that must be taken into consideration when choosing a research topic is that it must not be too broad, and it should be narrowed as much as possible in order to be more specific to the subjects themselves. Therefore, the answer would be "<span>Record labels first rose to prominence in the mid-twentieth century and became the largest player in the music business; today, they have less importance in the industry."</span>
