Identify the level of measurement of the data, and explain what is wrong with the given calculation.

A) Level of measurement: Ordinal; The calculation involves assigning numerical values to categories without equal intervals, which does not allow meaningful arithmetic operations.
B) Level of measurement: Interval; The calculation doesn't account for the ordinal nature of the data, leading to invalid interpretations.
C) Level of measurement: Nominal; The calculation mistakenly treats the assigned numerical values as equal intervals, which is not appropriate for the given data.
D) Level of measurement: Ratio; The calculation accurately represents the data's central tendency, but the assigned numerical values lack equal intervals, rendering arithmetic operations invalid.