The correct answer is letter D. “The Mark Twain” is the name of the riverboat at Disneyland although the correct name should be: The Mark Twain Riverboat. It started its operation on July 17, 1955 in Disneyland, Anaheim, California. It’s original name is Mark Twain Steamboat and it had its maiden voyage on July 13, 1955, just four days before Disneyland opened to the public. It had a rough start during its start since it almost capsized when the ride operators continued to accept more than 500 guests on board all at the same time.
With different refurbishments made, Mark Twain finally became one of the most successful theme park attractions in Disneyland. Note: If people visited Mark Twain Riverboat starting on January 11, 2016, they probably found out that the attraction was closed to the public. This was because Star Wars: Galaxy’s Edge was currently being constructed, but the attraction opened to the public again as of July 29, 2017.