I want to know the answer to the following question:
The Mahasanghikas argued that the Sthaviras were trying to expand what?
All the background I'm provided with is that "The Mahāsāṅghikas argued that the Sthaviras were trying to expand the vinaya and may also have challenged what they perceived were excessive claims or inhumanly high criteria for arhatship.". Is that enough to answer the question?
Answer: yes