Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.

Tom is the black sheen of the family, so he is never welcomed there.

A. a beloved member 

B. a bad and embarrassing member

C. the only child  

D. the eldest child

b) Ánh sáng không đơn sắc là gì ?