Sentence improvement — Subordinate clause after ‘‘ensure that’’: select the best finite-clause completion of ‘‘The company goes to great length to ensure that employees ___ comfortable in their work environment.’’ so the result clause is natural and precise.

Given data
The company goes to great length to ensure that employees can be comfortable in their work environment.

Concept/Approach
After ‘‘ensure that’’, we typically use a straightforward indicative clause that states the assured state: ‘‘employees are comfortable.’’ The modal ‘‘can’’ implies mere possibility, not ensured outcome.

Option analysis
are comfortable — Best: expresses the guaranteed state the company aims to secure.will be comfortable — Future orientation; unnecessary and less idiomatic.should be comfortable — Moral desirability, not assurance.No improvement — Retains weaker ‘‘can be’’.

Verification/Alternative
Also idiomatic: ‘‘ensure a comfortable work environment for employees.’’

Common pitfalls
Over-using modals like ‘‘can/should’’ when a simple finite verb better matches ‘‘ensure that’’.

Final Answer
are comfortable