In a certain place, two production management methods A and B were tried out in two factories. Their pilot work was carried out as follows: Method A was tried out in a large factory with leadership of high education level; Method B was tried out in a small factory with leadership of low education level, and Method A resulted in good economic benefits; Method B not good. Therefore, it was concluded that Method A was the reason for achieving better economic benefits.
The following option 'The conditions of the two factories are different and cannot be used as experimental bases to test the two management methods' can weaken the above conclusion.