Which one is a valid IPv6 address?

Hello friend:

D. a valid IPv6 address: FF00:810:0:8:106:1FF:F12:1

http://sqa.fyicenter.com/1000334_IPv6_Address_Validator.html#Result

Dear
D (FF00:810:0:8:106:1FF:F12:1) is Valid

For convenience, an IPv6 address may be abbreviated to reduce its length using these rules.

• One or more leading zeroes from any groups of hexadecimal digits are removed; this is usually done to either all or none of the leading zeroes. For example, the above IPv6 address can be abbreviated as: "2001:db8:0:0:0:ff00:42:8329".

• Consecutive sections of zeroes are replaced with a double colon (::). The double colon may only be used once in an address, as multiple use would render the address indeterminate. For example, the above IPv6 address can be abbreviated as: "2001:db8::ff00:42:8329".

D
A and E have wrong number of section
B and C have more then one reduction "::"