Which of the following does NOT need an apostrophe inserted or deleted?
AThe student's completed projects were displayed for parent's at the open house.
B.The students' completed projects were displayed for parents at the open house.
CThe students completed projects were displayed for parents' at the open house.
DThe students' completed projects were displayed for parents' at the open house.
AThe student's completed projects were displayed for parent's at the open house.
CThe students completed projects were displayed for parents' at the open house.
DThe students' completed projects were displayed for parents' at the open house.