Critical Reasoning

A football team recently finished its fall season of 12 games. The team scored an average of 10 more points per game in the 6 games it played in its home stadium than it did in those games played in opponents' stadiums. Clearly, the support of the team's fans provided the team with a psychological lift, leading to better score performance.
Which of the following, if true, casts the most doubt upon the argument above?

A. The team's fans were unhappy at times with the team's performance and occasionally booed the team.
B. The team's running back, its top scorer, scored more points in the opponents' stadiums than he did in the team's own stadium.
C. The field at the team's home stadium is unique in that the middle of the field is raised and the edges lowered, suiting the team's offensive system.
D. The team's head coach implored fans to support the team, stating that fan support helped the team perform well.
E. The team scored an average of only 24 points per game in its own stadium, ranking in the bottom quartile of scores for all teams.

which of these options best fit in to this question and why are you choosing the option over others?

I think the argument which most casts doubt is C. It is like the team cheats.

Experts, am I right?