i need some help please ;). will mark brainliest.

Answer:
D
Step-by-step explanation:
[tex]\frac{1}{7}[/tex]÷[tex]\frac{12}{1}[/tex]=1/84
[tex]\huge\sf\underline\red{Answer}[/tex]
[tex]\sf{ ⇒ \: \dfrac{1}{7} \div 12}[/tex]
[tex]\sf{ ⇒ \: \dfrac{ \dfrac{1}{7} }{12} }[/tex]
[tex]\sf{⇒ \dfrac{1}{7} \times \dfrac{1}{12} }⇒\dfrac{1}{84} [/tex]