A unit will evaluate all employees at the end of each year, and there are 5 awards, including the best professional award, the best creative award, the best collaboration award, the best writing award, and the annual star award. The star award can no longer be selected for the best creative award and the best professional award; if the collaborative award is selected, the writing award can no longer be obtained; if the professional award is selected, the collaborative award can no longer be obtained. Each person can get up to two awards. There are 3 employees in the general department, all of which have won all awards, but each award is different. The known employees have won the star award, and some of the employees B and C have received the writing award. It follows that the following guess must be correct? ['If B wins the writing award, he also receives a professional award.', 'If B wins the collaboration award, B and C each receive two awards.', 'If B wins the writing award and creativity award, then A must receive only one award.', 'If C wins the collaboration award, then B must not win the professional award.']