Choose the most grammatically correct sentence with the proper comma placement.For example, Dr$.$ Smith observed many blue$-$eyed newborns end up with brown eyes a few weeks after they are born.For example, Dr$.$ Smith observed, Many blue$-$eyed newborns end up with brown eyes a few weeks after they are born.For example, Dr$.$ Smith observed $,$ many blue$-$eyed newborns end up with brown eyes a few weeks after they are born.For example Dr$.$ Smith observed, Many blue$-$eyed newborns end up with brown$-$eyes a few weeks after they are born.