A Researcher Asked Random Samples of 50 Kindergarten Teachers and 50

Multiple Choice

A researcher asked random samples of 50 kindergarten teachers and 50 12th grade teachers how much money they spent out-of-pocket on school supplies in the previous school year,
To see if teachers at one grade level spent more than the other. A 95% confidence interval for ?_K ? ?₁₂ is $30 to $50. Based on this result, it is reasonable to conclude that

A) 95% of all kindergarten teachers spend between $30 and $50 more than 95% of all 12th grade teachers.
B) each kindergarten teacher spends $30 to $50 more than any 12th grade teacher.
C) kindergarten teachers spend more on average than do 12th grade teachers.
D) 12th grade teachers spend more on average than do kindergarten teachers.