Which sentence is the most formal in diction and style

A. I request the honour of your presence for a meal at my humble abode.

different situations we experience in life may be of   great influence   in our personality. it 's clear that a critical moment may change many decisions we could take.

in someway, refering to the book's description of the facts,   it's difficult to state how a person could feel commited, or willing to achieve his or her goals in life and to focus on his or   her personality development.

the person may lose interest on how he or she is or looks like, or even who he or she is. the main focus is trying to survive, or suffer less, looking forward to eating, dreaming about being free one day.

in this situation is very difficult to think about development. it's rather impossible.

the answer is:

b) to show the progression of inventions that took place in the bicycling industry.

hope it !