I believe the answer is C because if you looking for dog pictures and end up looking at cat pictures you went off topic, since you went to look at dog pictures. Its the same when you go looking for research on a topic.
Second one, makes the most sense to me personally
First, it is spelled servile. Second, here is your sentence!
The boy was servile and weak, intolerably vain and ambitious.
Answer:
Geoffrey Chaucer's, Canterbury Tales is a literary work that deals with the personal concerns and solutions of an evolving Medieval society. In Medieval Europe pilgrimages were common for personal reflection, penance, and spiritual renewal. Chaucer chose the framework of a pilgrimage for its naturally plausible diversity of people and mix of pious purpose and holiday spirit.