In Franz Kafka’s The Metamorphosis, the protagonist dislikes his job because he has to travel a lot and undertake mundane tasks. The last option is correct.
The protagonist in Franz Kafka’s The Metamorphosis, Gregor Samsa dislikes his job as a travelling salesman because he hates traveling so extensively, worrying all the time and he is not happy because he hasn't been able to build meaningful relationships and make real friends.
The Metamorphosis accounts the story of salesman Gregor Samsa who wakes one morning to find himself inexplicably transformed into a huge insect.
