Question

. Which sentence is punctuated correctly? A. There is a simple explanation for my sister’s attitude: She is too young to understand. B. There is a simple explanation for my, sister’s attitude she is too young to understand. C. There is a simple explanation for my sister’s; attitude She is too young to understand. D. There is a simple explanation for my: sister’s attitude she is too young to understand.

Answer 1

A. There is a simple explanation for my sister's attitude: She is too young to understand. 

Answer 2

I agree, the answer is a. The colon after attitude helps separate the cause and the explanation. All the other answers don't make sense because they didn't separate it properly.