"The first bicycles had no pedals. Riders pushed themselves along with their feet on the ground. ______ going uphill on these machines was slow and tiring." Options: (A) For example, (B) As a result, (C) However, (D) Similarly,
- Before the blank: riders had to push with their feet.
- After the blank: going uphill was slow and tiring.
- The second fact is caused by the first, so a result transition is needed. It is not an example, a contrast or a comparison.
Answer: (B) As a result,