The correct answer is D. Easy to handle
Step-by-step explanation:
In texts, it is common there are words whose meaning is unknown for the reader or words the reader is not familiarized with. However, in most cases, this type of words can be understood by using the context or other words that are linked to the word and provide clues about the meaning of this word. In the case of the word "tractable" used in the excerpt from Animal Farm, this word is used by the author of the narrator to describes the actions of the bulls "Bulls which had always been tractable suddenly turned savage" that were savage and seemed to destroy everything around them. Additionally, the use of the word "suddenly" shows the behavior of the bulls had changed and went from "tractable" to "savage", which means according to the context the word "tractable" means docile or easy to handle.