Hello there! The answer is C. Crowdsourced design.
Let's look at brief descriptions of the options:
Crowdfunding- taking donations (of money) from the public to help support whatever project the company is working on.
Crowd Voting - Takes the public's opinion on something and helps tailor what it's going to do based on the public's response.
Crowdsourced design - Having the public design something.
Crowd Tracking - Used to track down an individual in a crowd.
If the company is looking for the public to design something, the best option would be C, since they aren't asking the public for money, and they are asking them to make a new logo, not for their opinions on an existing one.
I hope this was helpful. Have a great rest of your day!