Jack wants to know how many families in his small neighborhood of 60 homes would help organize a neighborhood fund-raising party. He put all the addresses in a bag and drew a random sample of 30 addresses. He then asked those families if they would help organize the fund-raising party. He found that 12% of the families would help organize the party. He claims that 12% of the neighborhood families would be expected to help organize the party. Is this a valid inference?

A. No, this is not a valid inference because he asked only 30 families

B. No, this is not a valid inference because he did not take a random sample of the neighborhood

C. Yes, this is a valid inference because he took a random sample of the neighborhood

D. Yes, this is a valid inference because the 30 families speak for the whole neighborhood