id username premium_user 1001 ziggy TRUE 1002 aladdin FALSE 1003 duke TRUE 1004 tom FALSE 1005 jareth FALSE downloads table id user_id file_name 101 1002 space-oddity 102 1004 heroes 103 1002 heroes 104 1005 heroes 105 1001 rebel-rebel 106 1002 rebel-rebel 107 1005 fame 108 1002 changes users id INT(11) username VARCHAR(24) I premium_user TINYINT(1) Indexes downloads id INT(11) user_id INT(11) file_name VARCHAR(50) Indexes How many rows would the following LEFT JOIN query return? SELECT u.username, d.id download_id, d.file_name FROM users u LEFT JOIN downloads d ON u.id = d.user_id; O a. 8 b.9 O c. 4 d.5