The correct answer is: A) Skim and san
These ere quick reading techniques, they use rapid eye movement and keywords to move quickly trough a text.
Scanning refers to a rapid lecture to find specific facts, it can be used to look up a word in a dictionary for example. The key is to not read everything with the same amount of care and attention.
Skimming is when you read rapidly in order to get a general idea of the text. It can be used to browse through a book to see if you want to read it.
As you can see, by using skim and scan you can obtain the data you need for a research as it is based on quickness and the specific information.