Can someone help with the answers?

Which word correctly completes this question? ¿ características tiene el teléfono celular? a. quién b. qué c. cómo d. por qué

Sandra is cooking her famous brownies for her class for her recipe she needs 5/7 of a cup of sugar and 1/8 as much salt as sugar how much salt does she need for recipes

Me quedan tres dólares. are left over are bothering are lacking are important