Me with this will reward brainlest for the correct answer

The answer for Part A is B. lead as a guide, as we can get clues from the keywords "ranger", which means a person who protects the natural park or a forest, and is likely to be a guide. "teach" and "shows visitors around " are the duty of a guide which also indicates her role as a guide.

From the above we can also conclude that the answer for Part is C."shows visitors around " because this is the clearest keywords showing her role as a guide.

Therefore the answer Part A is B and Part B is C.

Hope it helps!

They were both presidents.