The Sacco and Vanzetti case was considered to be controversial because despite compelling evidence, they still were found not guilty.
The duo are arrested and lied to the police because they denied associating with anarchist Buda and denied visiting the garage.
Hence, the prosecution claimed that Sacco and Vanzetti lied to deny involvement in the robbery and murders and that these lies indicated their consciousness of guilt.
Because of this case, so many people felt that the trial had been less than fair and that the defendants had been convicted for their radical anarchist beliefs rather than for the crime for which they had been tried. All attempts for retrial on the grounds of false identification failed.
Therefore, the Option A is correct.
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