Provide an Appropriate Response $\$ 109.33$ Per Class Assuming the Population Standard Deviation of the Amount Spent

Provide an appropriate response.
-In a random sample of 60 dog owners enrolled in obedience training, it was determined that the mean amount of money spent per owner was $\$ 109.33$ per class. Assuming the population standard deviation of the amount spent per owner is $\$ 12$ , construct and interpret a $95 \%$ confidence interval for the mean amount spent per owner for an obedience class.

A) (\$106.29, \$112.37) ; we are $95 \%$ confident that the mean amount spent per dog owner for a single obedience class is between $\$ 106.29$ and $\$ 112.37$ .
B) (\$106.78, $\$ 111.88 )$ ; we are $95 \%$ confident that the mean amount spent per dog owner for a single obedience class is between $\$ 106.78$ and $\$ 111.88$ .
C) (\$106.23, \$112.43) ; we are $95 \%$ confident that the mean amount spent per dog owner for a single obedience class is between $\$ 106.23$ and $\$ 112.43$ .
D) (\$106.74, \$111.92) ; we are $95 \%$ confident that the mean amount spent per dog owner for a single obedience class is between $\$ 106.74$ and $\$ 111.92$ .