Question

Which one of the following statements describe the relationship between genes,chormosomes and DNA?
A genes,the basic unit of heredity,are located on chromosomes,which consist of strands of DNA
B genes are composed of chromosomes and Dna
C chromosomes,tha basic unit of heredity,direct the genes and the DNA
D DNA houses both genes and chromosomes in its rod-shaped structures,
Is it A OR D????