Step 1: Identify the conclusion
Secretaries who smoke should be offered enclosed offices.
Step 2 and 3: Line of reasoning
Premise: Enclosed office -> Allowed to smoke at desk.
Premise: Professionals -> Have enclosed offices.
Premise: Secretaries -> Lack enclosed offices.
Conclusion: Smoking secretaries -> Should be offered enclosed offices.
Link: Enclosed office privilege = Equal smoking opportunity across job ranks
Structure: Cause-Effect / Principle Argument
Step 4: Paraphrase (CRux of CR Table)
Based rules: The author assumes a principle of fairness that all employees who smoke must have an equal opportunity to do so, regardless of whether they are professionals or secretaries.
Step 5: Option Analysis
(A) Employees at the professional level who do not smoke should keep their enclosed offices.
Explanation: Non-smoking professionals are outside the core line of reasoning.
(B) Employees with enclosed offices should not smoke at their desks, even though the new regulations permit them to do so.
Explanation: This contradicts the facts given in the premise.
(C) Employees at the secretarial level should be allowed to smoke at their desks, even if they do not have enclosed offices.
Explanation: The conclusion advocates giving secretaries offices to meet regulations, not bypassing regulations.
(D) The smoking regulations should allow all employees who smoke an equal opportunity to do so, regardless of an employee's job level.
Explanation: Correct. Matches the paraphrase by providing the necessary principle that connects professional privileges to secretarial entitlement.
(E) The smoking regulations should provide equal protection from any hazards associated with smoking to all employees who do not smoke.
Explanation: Non-smoker protection is out of scope.