Write an Equivalent Expression $9(\mathrm{st})$ B) $\mathrm{t}(9 \mathrm{~s})$ C) (S9)t
D) $9 s+9 t$

Write an equivalent expression. Use an associative law.
-(9s) t

A) $9(\mathrm{st})$
B) $\mathrm{t}(9 \mathrm{~s})$
C) (s9) t
D) $9 s+9 t$