Your client, Smith, invents a composition for adhering metal to glass. You prepare a patent application including a specification and several claims of varying scope. Your specification includes a detailed description of Smith's invention, which sets forth the following: the composition is made from, among other things, a combination of A, B, and C; the composition is at least 20% A but can be up to 30% A; the composition works best if it is 24% to 26% A; and the composition contains substantially equal portions of B and C. Your specification also includes guidelines for determining what would constitute substantially equal portions of B and C in the composition. Furthermore, your specification includes a detailed explanation of why it is preferable to use 24% to 26% A. Among the following claims drawn to Smith's invention, which is the broadest claim that is unlikely to be properly rejected under 35 U.S.C. 112, second paragraph?