Mala needs to buy a new toothbrush. her dentist recommends an electric toothbrush for better cleaning. which requirements should mala look for when purchasing a new toothbrush? check all that apply. - the toothbrush is electric. - the toothbrush is safe to use. - the toothbrush is endorsed by celebrities. - the toothbrush's packaging claims that it works great. - the toothbrush is approved by a dental association.