Hello, I am unable to answer this Question.
For some time now, __ has been presumed not to exist: the cynical conviction that everybody has an angle is considered wisdom.
A) Rationality B) Flexibility C) Diffidence D) Disinterestedness E) Insincerity
Do your best to explain your thought process if you want to improve
So here first think where do you see a support or contrast,(: this symbolizes a support),
Now paraphrase the second setence you can see, the word --cynical conviction in on’e angle, so it means someone is very biased
Hence idea of the first sentence would be biased
----has been presumed not to exist, as already told people beineve popel are biased so “unbiased” won’t exist as if you paraphrase unbiased has been presumed not to exist means everybody is biased.