In Kant's view, analytic propositions are those that are true by definition and do not require experience. For example, in the case of \(7 + 5 = 12\), the knowledge of it is not derived solely from the meanings of the terms involved. It requires the application of intuition or an empirical representation, such as counting objects or marks on paper, to grasp the sum (hence, \(7 + 5 = 12\) is synthetic). Thus, the equation is not analytic.
\[
\boxed{\text{(A), (B), and (C) are correct; they explain the need for external intuition or analysis.}}
\]