Question

which information should be verified to ensure that a source of information about healthcare products and services is authentic and reliable?
the source is current.
the source promises a miracle.
the source is supported by opinions.
the source has a catchy phrase.

Explanation:

• 信息来源的时效性（The source is current）是判断其是否可靠的重要因素。过时的信息可能不再准确或适用。
• 承诺奇迹（The source promises a miracle）往往不可信，因为医疗保健产品和服务通常是基于科学和医学原理，而非奇迹。
• 基于观点（The source is supported by opinions）的信息不如基于事实和研究的信息可靠。
• 有吸引人的短语（The source has a catchy phrase）并不能保证信息的真实性和可靠性。

Answer:

The source is current.