Which of the following statements is/are false? (i) If a sample is selected using random sampling, it will be free from bias. (ii) A sampling frame is a numbered list of all items in a sample. (iii) In cluster sampling there is very little potential for bias. (iv) In quota sampling, investigators are told to interview all the people they meet up to a certain quota.  
A、(i), (ii), (iii) and (iv) 
B、(i), (ii) and (iii) 
C、(ii) and (iii) 
D、(ii) only