I can't say which wine is beat—it's a （n） of personal taste.27．I can't say which wine is beat—it's a （n）_____ of personal taste.A．affair B．eventC．matter D．variety为何选择C?D为什么不对?

I can't say which wine is beat—it's a （n） of personal taste.27．I can't say which wine is beat—it's a （n）_____ of personal taste.A．affair B．eventC．matter D．variety为何选择C?D为什么不对?
I can't say which wine is beat—it's a （n） of personal taste.
27．I can't say which wine is beat—it's a （n）_____ of personal taste.
A．affair
B．event
C．matter
D．variety
为何选择C?D为什么不对?

I can't say which wine is beat—it's a （n） of personal taste.27．I can't say which wine is beat—it's a （n）_____ of personal taste.A．affair B．eventC．matter D．variety为何选择C?D为什么不对?
a matter of意思是“关于……的问题”
D在意思上不对,在语法上也不对,因为a variety of后面应该加复数名词

it's a matter of personal taste.
那是个人口味的问题

个人口味的原因 matter 有原因的意思

句意就是说这是人们的口味问题，当然选C了。你想选D是因为你没看懂这句的意思。