Step 1: Understand the relationship between the clues.
The clues all relate to concepts involving structure or regulation, which are often governed by rules. "Order" and "Law" both involve systems of rules, while "Manner" and "Authority" also relate to the enforcement or adherence to rules.
Step 2: Evaluate each option.
(A) Rules: This is the correct answer, as all the clues can be associated with rules.
(B) Understanding: While understanding may be important in the context of laws or authority, it doesn’t fully fit all the clues.
(C) Stipulation: Although "stipulation" is related to rules, it doesn’t cover all the clues as comprehensively as "rules" does.
(D) Requirement: A requirement could be linked to these concepts but doesn’t fit as neatly as "rules."
(E) Excitement: This is unrelated to the clues, as excitement doesn’t fit the formal nature of order and law.
Step 3: Conclusion.
The correct answer is (A) Rules, as all the clues can be described in terms of rules.