Is this statement true or false, the law of conservation of mass states that in any chemical or physical change, energy is not created or destroyed

U because i am it just happened

The answer is c. ts-ang chieh

Iwanna say its mayan. not a 100 % sure hope it : )

The correct answer is a.the castrati were classical singers with very high voice equivalent to that of a soprano, mezzo-soprano or contralto. this effect of high voice was produced by castration before puberty or an endocrinological condition. the castrati first started signing at the church but then they also sang at the opera. they did not only sang in italy but in many churches in europe. finally, they were singing male and female roles as well.