For the next year, the Chefs' Union has requested a 10 percent salary increase for each of its members, whereas the Hotel Managers' Union has requested only an 8 percent salary increase for each of its members. These facts demonstrate that the average dollar amount of the raises that the Chefs' Union has requested for next year is greater than that of the raises requested by the Hotel Managers' Union. Which one of the following, if true, most strengthens the argument?
A: The average dollar amount of the raises that the members of the Chefs' Union received last year was equal to the average dollar amount of the raises that the members of the Hotel Managers' Union received.
B: The Chefs' Union has many more members than does the Hotel Managers' Union.
C: The Chefs' Union is a more powerful union than is the Hotel Managers' Union and is ttherefore more likely to obtain the salary increases it requests.
D: The current salaries of the members of the Chefs' Union are, on average, higher than the current salaries of the members of the Hotel Managers' Union.
Choose A, B, C or D as your solution.
D