Answer the following question given this paragraph: 

After cells differentiate, all the major organs begin to form during the remaining weeks of embryonic development. A few of the developments that occur in the embryo during weeks 4 through 8 are listed in Figure below . As the embryo develops, it also grows in size. By the eighth week of development, the embryo is about 30 millimeters (just over 1 inch) in length. It may also have begun to move.


Q: During which stage of development do all the major organs begin to form?

 Choices:

- third trimester

- nascent

- transgenic

- embryonic

A:
embryonic
