To connect to a MySQL DB system using MySQL Shell, you can use several command-line formats. Here, we will analyze the provided options:

A.mysqlsh -h 10.0.1.221 -u admin -p MySQL8.0

Incorrect format. The password should not be directly placed after the-pflag without a space or equals sign.

B.mysqlsh mysql://MySQL8.0:admin@10.0.1.221

Incorrect format. The username should come before the password in the URL.

C.mysqlsh mysql://admin:MySQL8.0@10.0.1.221

Correct format. This is a valid way to connect using a URL-like format whereadminis the username,MySQL8.0is the password, and10.0.1.221is the host.

D.mysqlsh -h10.0.1.221 -uadmin -pMySQL8.0

Correct format. This is a valid way to connect using flags, with no spaces between the flags and their values.

E.mysqlsh -host 10.0.1.221 -user admin -password MySQL8.0

Incorrect format. MySQL Shell uses-h,-u, and-pfor specifying host, username, and password respectively.