Which of the following statements about site collection is wrong?

Question $23$Select one:

a$.$

The administrator of site collection has the authority to manage all sites in the site collection, including the root site

b$.$

A site collection could belong to more than one content database

c$.$

In site collection, child sites are optional

d$.$

A site collection has one root site and a number of child sitesWhich of the following statements about site collection is wrong?

Question $23$Select one:

a$.$

The administrator of site collection has the authority to manage all sites in the site collection, including the root site

b$.$

A site collection could belong to more than one content database

c$.$

In site collection, child sites are optional

d$.$

A site collection has one root site and a number of child sites