Which sentence could be added to improve this conclusion?

Wexler blames weaknesses in our educational
system for why many students do not know facts
about history

O Wexler cites expert research that current methods
are resulting in a disheartening lack of civics
knowledge.

o Wexler cares a qkeat deal about the topic and is an
expert in educational reform.

O Wexler relies on strong reasoning, but some of her
points are rooted more in opinion than in fact.