17. On the average, people are more tolerant of becoming chilled in aquatic activities than non-aquatic activities because:

Answer: C- They are accustomed to getting out of the water if they get too cold.

Right. On land we put on a sweater or jacket if we get cold. If we get cold in the water, the first thought for most people is to get out. Of course, thermal aquatic wear is "clothing" to wear in the water to prevent becoming chilled before you are ready to get out.