Being honest is usually thought of as a virtue and undoubtedly this is the __.A issue B case C event D factor选什么?为什么?

Being honest is usually thought of as a virtue and undoubtedly this is the __.A issue B case C event D factor选什么?为什么?
Being honest is usually thought of as a virtue and undoubtedly this is the __.
A issue B case C event D factor
选什么?为什么?

Being honest is usually thought of as a virtue and undoubtedly this is the __.A issue B case C event D factor选什么?为什么?
选D
A issue 问题 B case 实例,案情
C event 事件（由指大事件） D factor 要素,因素
this 指代being honest,应该是在原文中说诚实通常被认为是一种美德,毫无疑问它是---
A和C首先排除,如果选B的话是指前半句话是实情,即诚实是一种美德是实情,这样解释有重复的嫌疑,所以选D,毫无疑问诚实是美德的要素.

B是正确答案
the case 是个固定短语。

选B比较恰当．可翻译成：诚实通常被认为是一种美德，这无疑是事实．

选D factor 要素
诚实经常被认为是一种美德，毫无疑问这是美德的要素