The correct answer is B) The survey result will be biased due to undercoverage.
Undercoverage occurs when some members of the population are inadequately represented in the sample. In this case, if the survey is based on a simple random sample (SRS) from the school roster, it may not include students who are less likely to be present on the roster, such as those who are absent or have irregular attendance. If Twit usage is correlated with attendance patterns, this could lead to underrepresentation of certain groups of students, introducing bias into the results.
Options A and E are incorrect because voluntary response bias refers to bias introduced when individuals choose whether or not to participate in the survey, and an SRS does not eliminate this potential bias. While an SRS is a good method for reducing bias, it does not guarantee complete freedom from bias, especially if undercoverage is an issue.
Option C is incorrect because the size of the sample (100 students versus 50 students) does not necessarily determine the closeness of the sample result to the true population value. The key factor is the representativeness of the sample, which depends on the sampling method and the potential for undercoverage.
Option D is also incorrect; generally, a larger SRS is more likely to provide a sample result closer to the true population value, assuming the sampling method is unbiased and the sample is representative of the population.