He was inspired by the art of Pablo Picasso and Julio Gonzalez. During his early years before he became an artist he also worked in an automobile factory where he learning soldering and spot-welding techniques. He then started to mix his technical knowledge and art to create art.
Answer: A. Their
Explanation: This one shows possession, while the other options (there, they're are not). They're is a conjunction for they are, and there means saying soemthing is "over there".