The Original Mars Landings Were Made by the Viking Spacecraft

The original Mars landings were made by the Viking spacecraft in 1976 and 1977. The next three landers were Mars Pathfinder and the exploration rovers Spirit and Opportunity. What is the main advantage of these last three over the older Vikings?

A) The Vikings bounced along the Martian surface until they came to rest, whereas the more recent craft made soft rocket landings.
B) The last three spaceships mounted cameras, while the Vikings had no cameras.
C) The Vikings had to remain where they landed, but the more recent spaceships were able to explore far and wide across the surface.
D) The Viking cameras were black and white, but the cameras on more recent spacecraft were color.