The sentence refers to introducing a new product into the market. The correct business term for introducing a new product is "launched."
Option (a) "started" could apply to beginning a process, but it is too general and not the standard term used in product releases.
Option (b) "commissioned" refers to ordering or authorizing the creation of something, not directly releasing it to the market.
Option (d) "begun" is similar to "started" and lacks the specific market-oriented meaning.
"Launch" is the term widely used to describe the official introduction of a product for sale or public use, making it the best choice here.