A question about of

[Pioneer1]

Is "of" correct in this sentence:

Students want to get the best grade they possibly can without having to make unduly unnecessary sacrifices of their extracurricular activities.

Thanks

 

[2006]

Is "of" correct in this sentence:

Students want to get the best grade they possibly can without having to make unduly unnecessary sacrifices of their extracurricular activities.

Thanks

I don't like the above sentence. Using the noun "sacrifices" and "of" sounds odd. The sentence is also too wordy; the grammar is much too wordy and "possibly" is unnecessary.

Students want to get the best grade they can without having to unduly sacrifice their extracurricular activities.
Students want to get the best grade they can without unduly sacrificing their extracurricular activities.

sacrifice..v, give up