We are given:

\(\begin{array}{|c|c|} \hline & Yes & No \\ \hline Junior& 150& 210\\ \hline Senior& 112& 200\\ \hline \end{array}\)

A) We determine the total number of students polled:

\(\displaystyle{150}+{210}+{112}+{200}={672}\frac{=}{{360}}\)

B) We check if a senior is more likely to be planning on a scientific major than a nonscientific major: \(\displaystyle\frac{{112}}{{>}}{200}\)

C) We check if a student planning on a scientific major is more likely to be a junior than a senior: \(\displaystyle{150}{>}{112}\)

D) We check if more seniors than juniors plan to enter a scientific field to study: \(\displaystyle\frac{{112}}{{>}}{150}\)

The true statement is C.