Answer:B
Explanation:trust me it's right
To obey the Pope's call to free the Holy city from the infidels and ensure access for pilgrims. To be forgiven for past sins. The Pope offered forgiveness for anyone who took part. This was important for knights who had killed many people in battle. To see the world, have an adventure and prove their bravery.
Someone already wrote a answer to the question the same as but with different wording; here you go.
Answer;
Peasants had an opportunity to move up in the social hierarchy by becoming artisans, merchants, or other types of professionals.