D. Dorothy wanders along the yellow brick road with Toto sitting in her basket, searching for clues about how to find the Emerald City.
Explanation:
Using context clues from the text, we can understand that this passage is in <em>present participle</em>. This is because of verbs like "wanders", and the use of the suffix "-ing" in the word "sitting" (infinitive form: to sit). Therefore, the verb "to search" gains the same suffix added to it.
