What evidence does the author give that mountain biking is one of the top competitive sports in the world? A Strength training improves biking ability. B Mountain biking is featured in the X Games. C The army tested mountain bikes by riding 1900 miles D 7 Today's bikes are far lighter than original models.

## Step 1<br />The question asks for evidence that the author provides to support the claim that mountain biking is one of the top competitive sports in the world. The options provided are:<br />A. Strength training improves biking ability.<br />B. Mountain biking is featured in the X Games.<br />C. The army tested mountain bikes by riding 1900 miles.<br />D. Today's bikes are far lighter than original models.<br /><br />## Step 2<br />We need to identify which of these options provides evidence that mountain biking is a competitive sport. <br /><br />## Step 3<br />Option A talks about strength training improving biking ability, but it doesn't provide evidence that mountain biking is a competitive sport.<br /><br />## Step 4<br />Option B states that mountain biking is featured in the X Games. The X Games is a well-known event where athletes compete in various sports, including mountain biking. This suggests that mountain biking is a competitive sport.<br /><br />## Step 5<br />Option C talks about the army testing mountain bikes by riding 1900 miles. This doesn't provide evidence that mountain biking is a competitive sport.<br /><br />## Step 6<br />Option D talks about today's bikes being lighter than original models. This doesn't provide evidence that mountain biking is a competitive sport.