Answer:
B. "And most young children today, believe it or not, spend as much time watching television as they do in the schoolroom."
D. "Is there no room on television to teach, to inform, to uplift, to stretch, to enlarge the capacities of our children?"
Step-by-step explanation:
The sentences that support the argument that television has the potential to have a profound influence on children are sentences B and D.
By spending a lot of time watching television, children are being influenced by it. According to the text, television can influence children as much as the school does. It's well-known that, after family, school is the second most important and influential environment for children. This illustrates how intense the influence of television can be.
Statement D tells us in what ways television could influence children. It could teach, inform, and uplift them; it could increase their capacities. This is the potential the author of the text is emphasizing.