Which statement is a fact and not an opinion?

今天有一道题和老师辩论了好久

原题：San Francisco is a beautiful city. It is in California. The climate is almost perfect. It has many wonderful restaurants. Everyone should try to visit San Francisco.
Q: Which statement is a fact and not an opinion?
A. San Francisco is a beautiful city.
B. It is in California.
C. The climate is almost perfect.
D. Everyone should try to visit San Francisco.

这道题很明显选B啊 B是毋庸置疑可被考证的事实 而ACD是带正向感情色彩的观点 但老师说这道题有问题应该是问哪个是opinion 老师选了D
然后我问了两个人大家都觉得ABC是事实 D是观点 本人从小学到高中是国际学校 不知道是不是因为和国内教育不一样导致思维方式有差异 望有人解答一下

转载： https://zhuanlan.zhihu.com/p/267927580