Explanation

Let's analyze each option:

• A: Stock options - These are typically long-term compensation with vesting periods, classified as long-term employee benefits
• B: Sabbatical paid leave - This is a long-term benefit that accrues over multiple years of service
• C: Contributions to social security - These are current period obligations that are typically paid within the same accounting period, making them short-term employee compensation

The correct answer is C: Contributions to social security because they represent current obligations that are settled in the short term, usually within the same fiscal year.