Question: CREATE TABLE Country ( ContinentCode CHAR ( 2 ) NOT NULL, IndepYear SMALLINT, PopDensity DECIMAL ( 7 , 2 ) NOT NULL, ISOCode 3 CHAR

CREATE TABLE Country (
ContinentCode CHAR(2) NOT NULL,
IndepYear SMALLINT,
PopDensity DECIMAL(7,2) NOT NULL,
ISOCode3 CHAR(3),
TLD CHAR(3),
Over65PopPct FLOAT
);Which columns can contain NULL values?

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