When qualifying a prospect, what are the most effective types of questions to ask?

Which of the following steps is immediately followed after the opening of the call and identification of the prospective customer?

 i.Mail me something/Can I get this in writing?

ii.I have to check with my spouse, can I call you back?

iii.Is this timeshare?

iv.Why do I have to give my credit card?

v.I need to think about it.

vi.My credit card is over the limit.

How are these statements by the prospect in sales terminology described as?

Read the following statements:

 i.Mail me something/Can I get this in writing?

ii.I have to check with my spouse, can I call you back?

iii.Is this timeshare?

iv.Why do I have to give my credit card?

v.I need to think about it.

vi.My credit card is over the limit.

How are these statements by the prospect in sales terminology described as?