在Sybase系统中，使用查询语句从“Persons”表中选取“Firstname”列的值等于“Peter”的所有记录，正确的是：
选项：

A:1、select all] from persons where firstname=‘Peter’
B:2、select * from persons where firstname like ‘Peter’
C:3、select all] from persons where firstname like ‘Peter’
D:4、select * from persons where firstname=’Peter’