A money market account is the type of account is most suitable for Sofia’s needs.
A money market account earns interest on the money that is deposited at a higher rate than a normal savings account. Even though this is not a common savings account, the account holder is able to write checks from the account if the money needs to be accessed. A money market account is a 'best of both worlds' account because the holder can benefit like a savings and checking account would allow (with some restrictions).