单选题 After Susan Joyce was laid off from Digital Equipment Corp. she was horrified to hear of two suicides in her layoff group. Then she learned about a colleague who stabbed his wife to death and hung himself. "I worked with him for 10 years, maybe more, "says Joyce. "He seemed like a nice guy. "
When being laid off, Susan Joyce had worked.

• A. for at least 10 years.
• B. for at most 10 years.
• C. on more than 10 jobs.
• D. for only one company.