What are the choices? If I had to choose a phrase without knowing of any choices, I would put "Bad studying" But im pretty sure thats not the answer you are looking for.
The plural of the noun proof is prooves.
In general, to form the plural of a singular regular noun, we must add an s at the end of the word:
- dog → dogs
- house → houses
- girl → girls
However, there are some exceptions, depending on the letter with which the noun ends.
When the singular noun ends in -f, we drop the -f and add -ves to form the plural.
This is why the plural of proof is prooves.
Other examples of plurals of nouns ending in -f are:
- Thief → thieves
- calf → calves
- half → halves
You can learn more about plurals in the link below:
brainly.com/question/14427668
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