NO.PZ2023102101000037
问题如下：
In regard to Core Tier 1 Capital, which of thefollowing is true?
选项：
A.
Preferred stock makes up the bulk of Core Tier 1 Capital.
B.
Core Tier 1 Capital has the least-stringentrequirements for what constitutes capital.
C.
Core Tier 1 must be at least 6 percent of risk-weighted assets beginning January 1, 2015.
D.
The retained earnings is part of the Core Tier 1 Capital.
解释：
Core Tier 1 Capital to risk-weighted assets must be4.5% beginning January 1, 2015. Common stock plus retained earnings, notpreferred stock, must make up the bulk of Core Tier 1 Capital. The requirementsfor Core Tier 1 Capital are the most-stringent, not the least-stringent.
core T1应该是包含equity capital，disclosed reserve和goodwill吧，为什么解析说not preferred stock？它不是包括在equity capital里吗
