To determine which chef is correct regarding the leanest domesticated duck, we need to consider the characteristics of both the moulard and Muscovy ducks.
The moulard duck is a crossbreed usually between a Pekin and a Muscovy. It is known for its rich meat and relatively high fat content, making it a popular choice for dishes like duck confit.
The Muscovy duck, on the other hand, is known for being leaner compared to other domesticated duck breeds. Muscovy ducks can have a lower fat content and are often regarded as a healthier option when it comes to duck meat.
Given this information, Chef B is correct that the Muscovy duck is the leaner option compared to the moulard duck.
Therefore, the answer is:
B) Chef B is correct.