 
<prompt> Riley is throwing a surprise party for their boss. Riley sends out an email to all the employees devising a plan and asking they keep the secret. Using the context above, what is your answer to the following question? Question: Why did Riley do this? 
A. make sure people arrived late to the party B. plan the surprise party C. make sure the surprise wasn't ruined <response>: C. make sure the surprise wasn't ruined 