In an informal conversation at work, a colleague of yours, John, congratulates you on winning 'the best employee of the month' award. Of the following responses, which one could be the most appropriate response to his wish?
a. "Thanks, John! I appreciate your kind words."
b. "Oh, it was nothing special. Just doing my job."
c. "I'm surprised too, to be honest. But thank you!"
d. "Well, you should've won it instead. You've been doing great work too."