After Discussing the First Main Point Oher Speech on the Exploration

After discussing the first main point oher speech on the exploration oMars, Jeanne said:
Let's take a moment to recap. To this point we have seen that scientists have made important discoveries about the terrain oMars, including its channels, basins, and polar caps. Now let's move on from the terrain oMars and look at the planet's atmosphere.
According to your textbook, what type oconnective did Jeanne use?

A) internal summary
B) transition
C) bridge
D) all of the above
E) a and b only