NO.PZ2023071902000001
问题如下：
Question Upon observing improvements in the combined index of concurrent economic signs, a rise in the consumer debt to earnings proportion would likely validate that an expansion is:
选项：
A.upcoming.
B.in progress.
C.concluding.
解释：
Incorrect. leading indicators suggest what's ahead, yet the consumer debt to earnings proportion is a trailing indicator. This is primarily because individuals tend to borrow more when they have faith in the economic situation.
Correct. The consumer debt to earnings proportion is a lagging indicator. A surge in this indicates that a positive shift has already started. This supports the evidence from concurrent indicators suggesting an ongoing expansion.
Incorrect. Even though the consumer debt to earnings proportion acts as a lagging indicator, it primarily signifies that a positive phase has begun, rather than the end of an expansion since individuals usually borrow more when they trust the economic state.
Understanding Business Cycles
• describe how resource use, consumer and business activity, housing sector activity, and external trade sector activity vary over the business cycle and describe their measurement using economic indicators
A不正确的。领先指标预示着未来，而消费者债务与收入之比是一个落后指标。因为当个人对经济形势有信心时，他们倾向于借更多的钱。
B正确的。消费者债务与收入之比是一个滞后指标。这一数字的激增表明，积极的转变已经开始。这支持了同时出现的指标表明经济正在扩张的证据。
C不正确的。尽管消费者债务占收入的比例是一个滞后指标，但它主要表明一个积极的阶段已经开始，而不是扩张的结束，因为当个人相信经济状况强劲时，他们通常会借更多的钱。
能否完整解释下题目和选项？