Which of the following statements regarding the principle of respect of person in data handling is true?

i$.$ If the participant did not ask, I have no obligation to explain the purpose of data collection

ii$.$ Researcher should be very cautious in not disclosing personal information of participants to any third party

iii. If the participants do not belong to any vulnerable group, there is no need for researcher to gain informed voluntary consent

all of these options

i only

ii only

none of these options