Answer:
All of the choices are correct.
Step-by-step explanation:
Accoding to the given information, Dianne is doing some research work on the Yosemite Valley and is scanning for relevant information by looking through the table of contents, self monitoring her comprehension by using a dictionary to look up new words, and summarizing relevant information by writing down important quotes.
Therefore, the reading strategies Dianne is using are: self-monitoring her comprehension, summarizing and synthesizing information, and deciding what is important in a text.
Therefore, the correct answer is "all the options are correct"