Your answer is C: He wants Rohan to concentrate on the race.
A- It's from educated experts and does not contain the same bias as D
The answer is C to define or clarify a term within a text. For example ‘me and my cousin (Bob) went to the shops.’ The bracket helps me understand what the cousin is.
Martians or Aliens, oppose to Zombies and other monsters, cause a unique fear because of the fact that outer space scares us. I mean, why shouldn't it? Space is a cold desolate place bigger than we could possibly imagine, whereas the earth, where we live, is mostly explored. That's not even including all the rumors about Alien cover-ups by the government.