Passage Analysis:
only empl with EC-->smoke @ desk. All empl with EC-->
PL. Also secretarial empl don't have EC. Seems like secretarial empl are not considered PL. Else they would have had an EC!
Conclusion : Secretaries who smoke should be offered enclosed offices.
GAP: Are we assuming that irregardless of PL, the secretaries would be offered an EC?
Which of the following is an assumption that enables the conclusion above to be properly drawn?
(A) Employees at the professional level who do not smoke should keep their enclosed offices.
Incorrect: This has no impact to the conclusion. Even if the group mentioned above keeps their enclosed office, this does not strengthen/weaken the fact that secretarial employees who smoke should be offered an EC.
(B) Employees with enclosed offices should not smoke at their desks, even though the new regulations permit them to do so.
Incorrect: Firstly,this does go against the premise (just as dcummins rightfully mentioned) and is a sort of a weakener to our conclusion above. (An assumption is a strengthener!)
(C) Employees at the secretarial level should be allowed to smoke at their desks, even if they do not have enclosed offices.
Incorrect: Again, this goes against our first statement in the premise "only employees with EC may smoke at their desks". It is also a weakener.
(D) The smoking regulations should allow all employees who smoke an equal opportunity to do so, regardless of an employee’s job level.
Correct:This is exactly the GAP that is necessary to be close for the conclusion to be strengthened.
(E) The smoking regulations should provide equal protection from any hazards associated with smoking to all employees who do not smoke.
Incorrect: No impact to our conclusion. Smoking hazard is irrelevant in this context.