Answer:
1. abriste (A)
2. caí (B)
3. mentimos (C)
4. bebió (B)
5. durmieron (A)
Explanatiion:
Conjugated the irregulars with their subjects. Said conjugation charts are usually available online in which specific Spanish words are shown conjugated to fit their subjects.
The answer is estudiamos because vamos is in the nosotros form
