Concept:
After the Mahāparinirvāṇa of the Buddha, the First Buddhist Council was held at Rājagṛha under the leadership of Mahākāśyapa. Ānanda, despite being the Buddha's closest attendant, was questioned regarding certain acts considered improper by senior monks.
Step 1: Examining the authentic charges against Ānanda.
• A. Walking on Buddha's robe --- This is mentioned in the Vinaya traditions. Ānanda admitted stepping on the robe unintentionally while sewing it.
• D. Allowing women into the Saṃgha --- Ānanda strongly requested the Buddha to permit Mahāprajāpati Gautamī and women to enter monastic life. This was treated as one of the charges during the council.
Step 2: Rejecting the incorrect statements.
• B. Chunda's house --- No such charge appears in canonical records.
• C. Cleaning the seat --- This is not listed among the formal accusations.
• E. Eating Buddha's food --- Completely incorrect and unsupported by Buddhist literature.
Step 3: Understanding the significance of these accusations.
The charges were not meant to insult Ānanda. Instead, they emphasized strict discipline and equality within the Saṃgha. Even a revered disciple had to accept communal correction.
Step 4: Final Conclusion.
The historically accepted charges among the given options are:
\[
\boxed{A \text{ and } D}
\]
Hence, Option (2) is correct.