诚实守信是职业道德建设的灵魂，是市场经济活动的一项基本道德准则，是现代法治社会的一项基本法律规则，也是一种具有道德内涵的法律规范。（ ）

单项选择题Which of the following is not a potential problem with text messages? A、Text message users are vulnerable to hackers and technical breakdowns. B、Text messaging can lead to job downtime. C、Text messaging may also lead to personal messages rather than job-related communication with colleagues or customers. D、Text messaging can decrease the intimidation with avoiding person-to-person situations.

单项选择题在人身意外伤害保险合同有效期间，被保险人遭受意外伤害后的一定时期(如180天或90天)被称为( )。 A.追溯期限 B.责任期限 C.扩展期限 D.保障期限