Answer:
The correct answer is option C) Whoever gets there on time
Step-by-step explanation:
The only subordinate clause in the options provided is C.
The dependent clause in this case is the one that has no meaning on its own since it needs another part to complete its meaning. It also has a verb in it as in "gets" and is introduced by the subordinating conjunction "whoever".
The rest of the options are not depedent clauses, for example option A) "the new students" could be the subject of the main sentence but no a subordinate clause.