Mode of heat transfer?

I am trying to settle an argument. I would appreciate it if anyone with an advanced degree indicate this in their answer. Think of this as a poll question...please answer even if someone already has given your answer [especially if you are a teacher or someone with an advanced degree in science.]

Here is the question:

A hot coal jumps from a fire pit, landing on a metal rubber mat. Clearly heat was transferred from the fire pit to the mat in this scenario.

Which type of heat transfer method [conduction, convection, radiation] was the predominant method in this situation?

I think the answer is obvious...but I'd like some confirmation.