Which of the following was key evidence against sacco

The key evidence against Sacco was that one of the bullets was said to have been fired from his gun.

Explanation:

Nicola Sacco was an Italian anarchist who, together with Bartolomeo Vanzetti, was arrested, tried, and electrocuted in Massachusetts on 1927, under the charge of stealing $ 15,766.51 from a shoe factory, the assassination of his accountant named Frederick Parmenter and a security guard named Alessandro Berardelli, despite much doubt of his guilt

The events took place in April 1920, with three berths. Both had alibi, but were the only accused of the crime. With Sacco and Vanzetti the police found weapons and ammunition; however, the ballistics test was confusing, without reaching consensus as to whether the bullets that killed the accountant and his security had departed from the weapon they found with Italian anarchists. The witnesses were also confused and contradictory, which made it even more difficult to find the truth.

in his book, the riddle of the rosetta stone, james giblin talks about how there was a young british polymath and physician named thomas young who made a lot of advances on the deciphering of the rosetta stone. he says that even though young made a lot of mistakes because he was working under false assumptions, he also made huge contributions like deciphering three out of the seven symbols (more than anyone else before him). young published his findings and continued his good work but he wasn't able to progress much further due to some unfavorable situations, he still laid the basis for many other scholars and of course for the man who has been generally known to have deciphered it, jean-françois champollion

b is the answer i am assuming