Identify the types of sampling errors that exist in the following sampling designs. (4 points)

I. The local newspaper plans to make a prediction for a senatorial election based on a survey of its readers.

II. A radio show asks people to phone in their views on whether the United States should pay off its debt to China.

III. A new social media website chooses to survey the first 50 members who join to determine whether members favor the appearance of the homepage.

I, nonresponse; II, voluntary; III, convenience

I, convenience; II, voluntary; III, nonresponse

I, voluntary; II, convenience; III, nonresponse

I, nonresponse; II, convenience; III, voluntary

I, voluntary; II, nonresponse; III, convenience