A survey of $800$ college students was conducted to study risky behaviors. The results showed the following:

• $280$ students admitted to speeding regularly.
• $190$ students admitted to using their phones while biking.
• $60$ students admitted to doing both.

If one student is randomly selected from this group, what is the probability that the student either sped regularly or used a phone while biking, but not both?

• A. $0.5875$
• B. $0.5347$
• C. $0.4375$
• D. $0.3525$

Answer: (C)