what is the purpose of the Negate Source check box?

When specifying a source for a security rule, what is the purpose of the Negate Source check box?

A.
If Negate Source is selected, the rule is sent to only the objects identified under object type.

B.
If Negate Source is selected, the rule is applied to traffic coming from all sources except for the source
identified under the object type.

C.
If Negate Source is not selected, the rule is applied to traffic coming from all sources except for the source
identified under the object type.

D.
if Negate Source is not selected, the rule is sent to only the objects identified under the object type.

Explanation:
https://pubs.vmware.com/NSX-6/index.jsp?topic=%2Fcom.vmware.nsx.admin.doc%2FGUIDC7A0093A-4AFA-47EC-9187-778BDDAD1C65.html