He was wanted at the outset of his career.

Answer: Option B

end : a final part of something, especially a period of time, an activity, or a story.
beginning : the point in time or space at which something begins.
middle : the point or position at an equal distance from the sides, edges, or ends of something.
entrance : an opening, such as a door, passage, or gate, that allows access to a place.
outset : the start or beginning of something.


Synonym of outset is beginning