Which description of a factor that encouraged people to migrate to the united states in the mid 1800s

Push and pull factors
A push factor is a when someone gets pushed out there country such as when war is in occurance or since there isn't enough land
A pull factor is when someone is drawn to the new place such as new jobs and land

It sells out to its shareholders

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.