[单项选择]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.