You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).

Paragraph: Different types of rocks weather at different rates. More resistant types of rocks will remain longer.
 Question: RJ diamond is more resistant to weathering while Tony has some sandstone which is less resistant to weathering. Whose rock will likely last longer? 
 Choices: A)RJ's 
B)Tony's
RJ's