I believe the answer is C because if you looking for dog pictures and end up looking at cat pictures you went off topic, since you went to look at dog pictures. Its the same when you go looking for research on a topic.
People encountered colorful characters, lively adventures, and hometown hospitality=The canal became a popular travel experience.
Social reforms like abolitionism thrived in the canal corridor=The canal became a venue for new ideas.
Freight rates fell to just 10% of their previous cost=Merchants using the canal had dramatic profit gains.
There are many leisure activities possible in and around the canal including. . .=The canal system has a new life as venue for recreation.
The uncomfortable 2-week wagon or stagecoach trip became possible in merely 5 days=The canal revolutionized transportation.
3 reasons to support your claim
she says that she learn English
