Concept:A party with a national outlook is one that is not restricted to a single ethnic or regional group.
Explanation:A truly national party is defined by the spread and composition of its membership.
Its members must come from different ethnic groups across the country.
This makes the party broad-based and all-embracing, unlike ethnically oriented parties.
Options A, C, and D do not guarantee a genuine national character.
Therefore, a national outlook means membership is open across ethnic boundaries.
Answer:B. its membership cut across ethnic boundaries