单选题An employee cannot access the company database. You check the connection variables: What is a valid explanation for why one of the users is unable to connect to the database?（）A Bob has max_user_connections set to zero, which blocks all his connectionsB Joe has exceeded the max_user_connections global limitC All users are blocked because max_user_connections is accumulated over the host account informationD Kay is already connected elsewhere and attempting to log in againE Connect_timeout is too small to allow a connection to occur
单选题
An employee cannot access the company database. You check the connection variables: What is a valid explanation for why one of the users is unable to connect to the database?（）
A
Bob has max_user_connections set to zero, which blocks all his connections
B
Joe has exceeded the max_user_connections global limit
C
All users are blocked because max_user_connections is accumulated over the host account information
D
Kay is already connected elsewhere and attempting to log in again
E
Connect_timeout is too small to allow a connection to occur
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