Answer:
D. Temperature(minutes), or t(m)
Explanation:
Option D is the correct answer. 
( D.temperature(minutes), or t(m) ) 
Step-by-step explanation: 
We are given that: 
The temperature of the coffee depends on the number of minutes it sits on the desk. 
i.e. the temperature(t) of coffee is a function of time in minutes (t). 
i.e. times is a independent variable and temperature is a dependent variable. 
Hence, the most appropriate name for the function described below is: 
temperature(minutes), or t(m). 
Hence, option D is correct.