On the English saying that ten minus four equals six There are three options A.TEN MINUS SIX IS FOUR B.TEN MINUS SIX EQUALS TO FOUR C.TEN SUBTRACT SIX IS FOUR The correct answer is a. why are B and C wrong?

On the English saying that ten minus four equals six There are three options A.TEN MINUS SIX IS FOUR B.TEN MINUS SIX EQUALS TO FOUR C.TEN SUBTRACT SIX IS FOUR The correct answer is a. why are B and C wrong?

Mini is used as a preposition here, so ten Mini six can be regarded as a noun phrase and can be used as a subject
In option B, equal is a transitive verb, without the preposition to, and should be ten minus six equals four
In the C option, subtract is a verb and ten subtract six cannot be the subject