Definition: In this task, you're given a statement and three sentences as choices. Your job is to determine which sentence can be inferred from the statement. Incorrect choices change the meaning in important ways or have details that are not mentioned in the statement. Indicate your answer as 1,2, or 3 corresponding to the choice number of the selected sentence.
Input: Statement: If he had spent time in the archives, says van Pelt, he would have found evidence about ventilation systems, ways to introduce Zyclon B into these buildings--but of course I don't think he knows German so it wouldn't have helped very much. Choices:  1. All the research materials were on German that's why he did not bother spending time in the archives.  2. He did not spend enough time researching on the matter.  3. He was researching on the chemical reaction of Zyclon A into the walls of the building.  

2