Final answer:
Based on the conditions set by the university library budget committee, if L is reduced then G must also be reduced.
Step-by-step explanation:
The question involves a scenario where the university library budget committee has to reduce expenditure in certain areas based on a set of conditions. When addressing which area of expenditure must be reduced if L is reduced, we look at the provided conditions. According to the conditions, if L is reduced, then G must be reduced. Therefore, the correct answer to the question 'Which area of expenditure must be reduced if L is reduced?' is option (a) G.