The TRUE statement is a) Tim sought to promote non-response bias in his survey.
What is non-response bias?
Non-response bias occurs when some of the respondents, especially married women, do not respond to Tim's survey because of the omission of the female names in the mailing addresses. By failing to include the female names, Tim may cause some women to refuse participation while other females may not be reached.
We cannot conclude that Tim sought to promote participation bias or that he uncovered selection or deliberate bias in his methods.
Thus, we can conclude that Tim sought to promote non-response bias in his survey.
Learn more about non-response bias here: https://brainly.com/question/25116315