（单选题）Which of the following best describes the mechanism by which chromatin-remodeling complexes “loosen" （放松）the DNA wrapped around the core histones
选项：

A:They use energy derived from ATP hydrolysis to change the relative position of the DNA and the core histone octamer.
B:They chemically modify the DNA, changing the affinity between the histone octamer and the DN
A:
C:They remove histone H1 from the linker DNA adjacent to the core histone octamer.
D:They chemically modify core histones to alter the affinity between the histone octamer and the DN
A: