汉传佛教传入中国内地，大体经过了四个阶段。在第一阶段的介绍时期，汉传佛教的译文，从一开始就不甚忠实于原文；越过介绍时期，进入第二阶段的融合时期。这时大部分佛经都有了汉文译本。汉传佛教第三阶段在隋唐时期，这一时期的特点在于摆脱佛教原有的框架，由中华本土佛教学者、宗派创始人开始构建中国佛教的新体系；汉传佛教的第四阶段，宋元明清以后形成三教合一，以儒为主导的局面持续了近千年。最能准确复述这段话的主要意思的是（）。

A.佛教传入我国始于汉代

B.佛教与中国文化的融合经历了四大阶段

C.佛教从汉代开始，历史源远流长

D.佛教传入的各个时期界限明显

With respect to major bond markets around the world, which of the following statements is most accurate

A. Investors in one country that acquires bonds issued by the government of another country are believed to be risk-free.
B. The factors that affect yield spreads in the U. S. are different than the factors that affect yield spreads in other countries and between countries.
C. An investor in one country that buys bonds denominated in the currency of another country has unknown cash flows in the investor's domestic currency.