b) to mountain-bike
since the sentence follows along with to run and to swim the answer has to be "to mountain-bike".
Here is the answer to the given question above. As slavery grew in American, writers on both sides of the Atlantic noted a contradiction and this is, t<span>here were some colonies with no slaves. The answer for this question would be option C. Hope this answers your question. </span>
<span>All human endeavors eventually disappear.</span>
