Step-by-step Solution:

The sentence requires a phrase that correctly conveys the idea of being responsible for or explaining the spending of money. Let’s analyze the options:\[\] (a) allow for - This phrase means to consider something in planning, not to explain spending. It is incorrect here. \[\] (b) give account for - This phrase is incorrect because the proper idiomatic construction is account for, not give account for. \[\] (c) account for - This is the correct choice as it means to explain or justify the spending of money. \[\] (d) as for - This phrase does not fit the context and is grammatically incorrect in this sentence. \[\] \[\] Correct Answer: (c)